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5 Thousands of . Year Acre-Feet Cubic Meters 1974 (June 25 to December 31) 57,055 70,377 1975 107,916 133,113 1976 108,090 133,328 1977 93,259 115,034 1978 80,592 99,409 .....,. 1979 87,770 108,263 I-" 1980 102,196 126,058 <=> 1981 115,994 143,077 CO 1982 107,697 132,843 1983 97,784 120,616 1984 111,884 138,007 1985 111,952 138,091 1986 124,829 153,974 1987 118,025 145,581 1988 112,553 138,832 1989 135,677 167,355 . The deliveries to Mexico on the land boundary and in the 1imitrophe section below More1os Dam in calendar year 1989 which were less than the annual volume of 140,000 acre-feet (172,689,000 cubic meters) referred to in Minute 242 were made up by waters delivered to Mexico in the bed of the river above More1os Dam as is required by Point 1 of the Minute. The quantities of water delivered across the land boundary at San Luis and in the 1imitrophe section below More1os Dam were less than the annual volume of 140,000 acre-feet (172,689,000 cubic meters) referred to in Minute 242, because of the effects of pumping in prior years of groundwaters by the Yuma Mesa wells, the protective and regulatory pumping wells in the U.S., drainage wells in the Yuma Valley and by Mexican wells near San Luis. Average salinities of the waters delivered to Mexico on the land boundary at San Luis under Minute No. 242, since it became effective on June 24, 1974, are tabulated as follows: . Year 1974 (June 25 to December 31) 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 Total Dissolved Solids in ppm (U.S. Count) 1515 1500 1480 1510 1470 1538 1582 1572 1470 1434 1487 1513 1496 1431 1488 1300