Year Total 1965 297440000 1966 308270000 1967 313050000 1968 310320000 1969 316220000 1970 312160000 1971 318470000 1972 327000000 1973 330880000 1974 332500000 1975 341970000 1976 341600000 1977 347730000 1978 345630000 1979 348130000 1980 337530000 1981 335390000 1982 340530000 1983 341400000 1984 338180000