Annual % of total population
1960 28.6964654008943
1961 29.2802295819437
1962 29.6823180123733
1963 29.9140228163429
1964 30.0181113464476
1965 29.9945095632274
1966 30.1347153395996
1967 30.4923825136612
1968 30.7607236645433
1969 30.8622363641887
1970 30.6337676454373
1971 30.169623444326
1972 29.6819726679477
1973 29.1737223520544
1974 28.6334905791762
1975 28.0734339036521
1976 27.5312464224227
1977 27.0142727288237
1978 26.5270948161733
1979 26.1067964716794
1980 25.8064202690968
1981 25.6219107573236
1982 25.5023361744216
1983 25.3988420259972
1984 25.3058307160109
1985 25.2327225982591
1986 25.1603667906856
1987 25.0912516168061
1988 25.0070892693828
1989 24.932882427385
1990 24.955915510238
1991 25.0357306896678
1992 25.0791346790213
1993 25.0795463920019
1994 25.0260258631953
1995 24.9045652068731
1996 24.7261236073049
1997 24.4945185722857
1998 24.1921983531799
1999 23.7995876892038
2000 23.320806288703
2001 22.7701342134113
2002 22.1641526891239
2003 21.5440096997766
2004 20.9263449865808
2005 20.2870658665855
2006 19.6696253750285
2007 19.1832115460746
2008 18.8812867804032
2009 18.7571097163714
2010 18.71523661063
2011 18.6946019820696
2012 18.7109986552257
2013 18.7752846159789
2014 19.0039173501385
2015 19.3810240532551
2016 19.7683175510659
2017 20.1268856544447
2018 20.4501865560364
2019 20.7125497290304
2020 20.9070472172478
2021 21.0943113055418
2022 21.2641566954044
2023 21.3242050896365