Year IowaVMT Year. Month. MonthlyVMT 1950 9434 1978 1 1319 1951 9350 1978 2 1295 1952 9721 1978 3 1520 1953 9970 1978 4 1598 1954 9811 1978 5 1774 1955 10244 1978 6 1778 1956 10382 1978 7 1854 1957 10227 1978 8 1863 1958 10609 1978 9 1694 1959 10971 1978 10 1707 1960 11255 1978 11 1553 1961 11471 1978 12 1511 1962 11687 1979 1 1249 1963 12036 1979 2 1299 1964 12384 1979 3 1470 1965 12733 1979 4 1607 1966 13439 1979 5 1731 1967 14145 1979 6 1712 1968 15047 1979 7 1757 1969 15542 1979 8 1792 1970 16053 1979 9 1648 1971 16581 1979 10 1653 1972 17127 1979 11 1510 1973 17690 1979 12 1531 1974 17250 1975 17853 1976 18440 1977 19028 1978 19466 1979 18959