Annual % of total population
1960 25.7704557431891
1961 25.3440759591902
1962 25.297766191739
1963 25.4364800842253
1964 25.4379577675933
1965 25.4250402559652
1966 25.472892919884
1967 25.5439773226334
1968 25.5998750463695
1969 25.6445540202206
1970 25.7279370432827
1971 25.8339798293251
1972 25.8738059510303
1973 25.8223714052436
1974 25.6925319941681
1975 25.4584778178958
1976 25.2063988068817
1977 25.047200606991
1978 24.8902931367386
1979 24.6627996365924
1980 24.3544233312452
1981 24.0344911343211
1982 23.909503516613
1983 23.8953387627794
1984 23.7720578018619
1985 23.5017175539242
1986 23.0740896653336
1987 22.5576542161856
1988 22.0303571428571
1989 21.3851015801354
1990 20.6373320642823
1991 19.9610930986568
1992 19.7123770643904
1993 19.8336898001328
1994 19.9200923702876
1995 19.8985827116356
1996 19.8297655639016
1997 19.7308034175631
1998 19.5798881872953
1999 19.35151919987
2000 19.0689039886091
2001 18.6179902959903
2002 18.2844850766335
2003 18.2802727818805
2004 18.3103496308678
2005 18.3447376995764
2006 18.2698482441613
2007 18.1290838778504
2008 18.0781946477622
2009 18.067070103996
2010 18.0954513466829
2011 18.1269025124994
2012 18.0926320371896
2013 17.961494554318
2014 17.8478984346111
2015 17.8000891772629
2016 17.7460463688009
2017 17.6952334212625
2018 17.618230825778
2019 17.463401202368
2020 17.2309950012994
2021 17.1031084038629
2022 17.0403381420564
2023 16.9218532511434