1949 13,913,927
1950 14,711,260
1951 14,413,123
1952 17,236,621
1953 16,745,695
1954 18,513,434
1955 18,612,172
1956 17,364,027
1957 18,998,424
1958 17,135,981
1959 13,059,787
1960 14,684,726
1961 11,414,017
1962 20,923,112
1963 27,866,189
1964 24,144,848
1965 24,799,129
1966 24,828,470
1967 21,736,582
1968 27,718,516
1969 25,018,386
1970 28,012,344
1971 25,160,381
1972 24,800,391
1973 23,630,435
1974 22,874,423
1975 21,136,635
1976 20,491,797
1977 17,931,155
1978 18,831,591
1979 18,924,822
1980 18,393,809
1981 19,122,938
1982 23,100,427
1983 20,065,048
1984 20,313,426
1985 20,429,326
1986 23,190,076
1987 25,282,644
1988 24,576,191
1989 25,137,678
1990 26,210,044
1991 20,082,026
1992 18,752,106
1993 17,914,756
1994 16,470,140
1995 16,933,559
1996 15,224,282
1997 14,454,335
1998 14,010,711
1999 11,495,247
2000 13,793,799
2001 17,020,000
2002 16,470,000
2003 15,990,000
2004 15,930,000
2005 16,170,000
2006 15,840,000
2007 15,940,000
2008 16,080,000
2009 16,150,000
2010 15,740,000
2011 16,040,000
2012 16,350,000
2013 16,400,000
2014 16,870,000
2015 16,550,000
2016 17,860,000