|
| Rank | Year | | Annual Flow | 3-Year Mean |
| 1949 | -662688000000 | 385.6 |
|
| 1950 | -631152000000 | 560.0 |
|
| 1951 | -599616000000 | 964.9 |
636.8 |
| 1952 | -568080000000 | 1097.8 |
874.2 |
| 1953 | -536457600000 | 608.9 |
890.5 |
| 1954 | -504921600000 | 450.2 |
718.9 |
| 1955 | -473385600000 | 341.5 |
466.9 |
| 1956 | -441849600000 | 1018.7 |
603.5 |
| 1957 | -410227200000 | 474.3 |
611.5 |
| 1958 | -378691200000 | 920.6 |
804.5 |
| 1959 | -347155200000 | 260.3 |
551.7 |
| 1960 | -315619200000 | 374.7 |
518.5 |
| 1961 | -283996800000 | 234.8 |
289.9 |
| 1962 | -252460800000 | 468.5 |
359.3 |
| 1963 | -220924800000 | 842.4 |
515.2 |
| 1964 | -189388800000 | 360.9 |
557.3 |
| 1965 | -157766400000 | 992.0 |
731.8 |
| 1966 | -126230400000 | 294.9 |
549.3 |
| 1967 | -94694400000 | 838.9 |
708.6 |
| 1968 | -63158400000 | 365.3 |
499.7 |
| 1969 | -31536000000 | 982.8 |
729.0 |
| 1970 | 0000 | 711.0 |
686.4 |
| 1971 | 31536000000 | 676.3 |
790.0 |
| 1972 | 63072000000 | 407.0 |
598.1 |
| 1973 | 94694400000 | 656.4 |
579.9 |
| 1974 | 126230400000 | 979.4 |
680.9 |
| 1975 | 157766400000 | 575.7 |
737.2 |
| 1976 | 189302400000 | 157.6 |
570.9 |
| 1977 | 220924800000 | 64.1 |
265.8 |
| 1978 | 252460800000 | 728.0 |
316.6 |
| 1979 | 283996800000 | 430.2 |
407.4 |
| 1980 | 315532800000 | 854.1 |
670.8 |
| 1981 | 347155200000 | 223.2 |
502.5 |
| 1982 | 378691200000 | 1334.5 |
803.9 |
| 1983 | 410227200000 | 1306.4 |
954.7 |
| 1984 | 441763200000 | 807.8 |
1149.6 |
| 1985 | 473385600000 | 309.8 |
808.0 |
| 1986 | 504921600000 | 1002.5 |
706.7 |
| 1987 | 536457600000 | 185.7 |
499.4 |
| 1988 | 567993600000 | 183.5 |
457.2 |
| 1989 | 599616000000 | 507.5 |
292.2 |
| 1990 | 631152000000 | 255.1 |
315.4 |
| 1991 | 662688000000 | 265.5 |
342.7 |
| 1992 | 694224000000 | 198.3 |
239.7 |
| 1993 | 725846400000 | 747.7 |
403.9 |
| 1994 | 757382400000 | 174.2 |
373.4 |
| 1995 | 788918400000 | 1249.1 |
723.7 |
| 1996 | 820454400000 | 819.2 |
747.5 |
| 1997 | 852076800000 | 1040.4 |
1036.3 |
| 1998 | 883612800000 | 914.1 |
924.6 |
| 1999 | 915148800000 | 714.8 |
889.8 |
| 2000 | 946684800000 | 532.9 |
720.6 |
| 2001 | 978307200000 | 229.6 |
492.4 |
| 2002 | 1009843200000 | 446.5 |
403.0 |
| 2003 | 1041379200000 | 545.9 |
407.3 |
| 2004 | 1072915200000 | 378.0 |
456.8 |
| 2005 | 1104537600000 | 784.7 |
569.5 |
| 2006 | 1136073600000 | 1138.8 |
767.2 |
| 2007 | 1167609600000 | 291.9 |
738.5 |
| 2008 | 1199145600000 | 281.6 |
570.8 |
| 2009 | 1230768000000 | 466.4 |
346.7 |
| 2010 | 1262304000000 | 502.5 |
416.9 |
| 2011 | 1293840000000 | 1070.1 |
679.7 |
| 2012 | 1325376000000 | 399.2 |
657.3 |
| 2013 | 1356998400000 | 393.0 |
620.8 |
| 2014 | 1388534400000 | 211.4 |
334.5 |
| 2015 | 1420070400000 | 207.2 |
270.5 |
| 2016 | 1451606400000 | 600.4 |
339.7 |
| 2017 | 1483228800000 | 1597.3 |
801.6 |
| 2018 | 1514764800000 | 501.2 |
899.6 |
| 2019 | 1546300800000 | 881.8 |
993.5 |
| 2020 | 1577836800000 | 313.1 |
565.4 |
| 2021 | 1609459200000 | 155.7 |
450.2 |
| 2022 | 1640995200000 | 416.6 |
295.1 |
| 2023 | 1672531200000 | 957.9 |
510.1 |
| 2024 | 1704067200000 | 475.6 |
616.7 |
| 2025 | 1735689600000 | 537.2 |
656.9 |
| 2026 | 1767225600000 |
698.2 |
570.4 |
| Rank | Year | | Seasonal Flow | 3-Year Mean |
| 1949 | -662688000000 | 252.6 |
|
| 1950 | -631152000000 | 308.1 |
|
| 1951 | -599616000000 | 204.5 |
255.1 |
| 1952 | -568080000000 | 586.9 |
366.5 |
| 1953 | -536457600000 | 344.7 |
378.7 |
| 1954 | -504921600000 | 217.1 |
382.9 |
| 1955 | -473385600000 | 209.2 |
257.0 |
| 1956 | -441849600000 | 309.4 |
245.2 |
| 1957 | -410227200000 | 252.7 |
257.1 |
| 1958 | -378691200000 | 525.4 |
362.5 |
| 1959 | -347155200000 | 110.6 |
296.3 |
| 1960 | -315619200000 | 152.7 |
262.9 |
| 1961 | -283996800000 | 132.5 |
131.9 |
| 1962 | -252460800000 | 250.2 |
178.5 |
| 1963 | -220924800000 | 362.9 |
248.5 |
| 1964 | -189388800000 | 195.4 |
269.5 |
| 1965 | -157766400000 | 299.8 |
286.0 |
| 1966 | -126230400000 | 146.0 |
213.7 |
| 1967 | -94694400000 | 433.8 |
293.2 |
| 1968 | -63158400000 | 120.3 |
233.4 |
| 1969 | -31536000000 | 433.2 |
329.1 |
| 1970 | 0000 | 131.0 |
228.1 |
| 1971 | 31536000000 | 309.4 |
291.2 |
| 1972 | 63072000000 | 182.0 |
207.5 |
| 1973 | 94694400000 | 246.8 |
246.1 |
| 1974 | 126230400000 | 338.0 |
255.6 |
| 1975 | 157766400000 | 342.0 |
308.9 |
| 1976 | 189302400000 | 60.3 |
246.8 |
| 1977 | 220924800000 | 40.4 |
147.6 |
| 1978 | 252460800000 | 314.5 |
138.4 |
| 1979 | 283996800000 | 240.0 |
198.3 |
| 1980 | 315532800000 | 254.1 |
269.5 |
| 1981 | 347155200000 | 100.7 |
198.3 |
| 1982 | 378691200000 | 512.6 |
289.2 |
| 1983 | 410227200000 | 551.2 |
388.2 |
| 1984 | 441763200000 | 199.7 |
421.2 |
| 1985 | 473385600000 | 158.4 |
303.1 |
| 1986 | 504921600000 | 179.7 |
179.3 |
| 1987 | 536457600000 | 82.9 |
140.3 |
| 1988 | 567993600000 | 71.2 |
111.3 |
| 1989 | 599616000000 | 204.3 |
119.5 |
| 1990 | 631152000000 | 118.6 |
131.4 |
| 1991 | 662688000000 | 170.2 |
164.4 |
| 1992 | 694224000000 | 73.6 |
120.8 |
| 1993 | 725846400000 | 335.4 |
193.1 |
| 1994 | 757382400000 | 82.5 |
163.8 |
| 1995 | 788918400000 | 549.9 |
322.6 |
| 1996 | 820454400000 | 354.6 |
329.0 |
| 1997 | 852076800000 | 154.6 |
353.0 |
| 1998 | 883612800000 | 449.6 |
319.6 |
| 1999 | 915148800000 | 289.4 |
297.9 |
| 2000 | 946684800000 | 198.6 |
312.5 |
| 2001 | 978307200000 | 115.7 |
201.2 |
| 2002 | 1009843200000 | 195.8 |
170.0 |
| 2003 | 1041379200000 | 293.3 |
201.6 |
| 2004 | 1072915200000 | 133.6 |
207.5 |
| 2005 | 1104537600000 | 430.0 |
285.6 |
| 2006 | 1136073600000 | 516.7 |
360.1 |
| 2007 | 1167609600000 | 106.2 |
351.0 |
| 2008 | 1199145600000 | 147.0 |
256.7 |
| 2009 | 1230768000000 | 238.0 |
163.8 |
| 2010 | 1262304000000 | 327.1 |
237.4 |
| 2011 | 1293840000000 | 516.9 |
360.7 |
| 2012 | 1325376000000 | 222.5 |
355.5 |
| 2013 | 1356998400000 | 81.6 |
273.7 |
| 2014 | 1388534400000 | 87.7 |
130.6 |
| 2015 | 1420070400000 | 39.8 |
69.7 |
| 2016 | 1451606400000 | 182.4 |
103.3 |
| 2017 | 1483228800000 | 462.8 |
228.4 |
| 2018 | 1514764800000 | 209.0 |
284.8 |
| 2019 | 1546300800000 | 420.0 |
363.9 |
| 2020 | 1577836800000 | 192.0 |
273.7 |
| 2021 | 1609459200000 | 77.9 |
230.0 |
| 2022 | 1640995200000 | 153.5 |
141.1 |
| 2023 | 1672531200000 | 411.3 |
214.2 |
| 2024 | 1704067200000 | 230.4 |
265.1 |
| 2025 | 1735689600000 | 203.4 |
281.7 |
| 2026 | 1767225600000 |
182.0 |
205.3 |
|