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<br />'y D028~7 . .
<br /> YEAA CRSS NATURAL FLOW VIRGIN FLOW OIFFERENCE PERCENT OF NATURAL FLOW
<br /> 1952 20,919 20,665 254 1. 21
<br /> 1953 11 ,222 10,636 586 5.22
<br /> 1954 8,384 7,661 723 8.62
<br /> 1955 9,814 9,188 626 6.38
<br /> 1956 11 ,515 10,749 766 6.65
<br /> 1957 20,177 20,095 82 0.41
<br /> 1958 16,939 16,489 450 2.66
<br /> 1959 9,246 8,609 637 6.89
<br /> 1960 11 , 986 11 ,263 723 6.03
<br /> 1961 9,279 8,457 822 8.86
<br /> 1962 17,784 17,299 485 2.73
<br /> 1963 9,279 8,450 829 8.93
<br /> 1964 10,814 10,156 658 6.08
<br /> 1965 18,881 18,913 32 -0.17
<br /> 1966 11,638 11 , 208 430 3.69
<br /> 1967 11 , 834 11 ,907 73 -0.62
<br /> 1968 13,532 13,664 - 132 -0.98
<br /> 1969 14,877 14,386 491 3.30
<br /> 1970 15,360 15,405 45 -0.29
<br /> 1971 15,225 15,133 92 0.60
<br /> 1972 12,320 12,194 126 1.02
<br /> 1973 19,435 19,395 40 0.21
<br /> 1974 13,307 13,325 18 -0. 14
<br /> 1975 16,150 16,600 - 450 -2.79
<br /> 1976 10,722 11 ,598 - 876 -8.17
<br /> 1977 5,U22 5,778 - 756 -15.05
<br /> 1978 14,659 15,157 - 498 -3.40
<br /> 1979 17 ,541 17,855 - 314 -1.79
<br /> 1980 16,377 17,497 -1,120 -6.84
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