Annual % of total population
1960 34.8904830933008
1961 34.9625603628614
1962 34.9399307620831
1963 34.8415071689846
1964 34.7109514026056
1965 34.515805292524
1966 34.2828868130547
1967 34.0366485428392
1968 33.6507487429953
1969 33.1594840093048
1970 32.6327347066534
1971 32.0918072861848
1972 31.6055662050471
1973 31.1806059122115
1974 30.6761860080546
1975 30.067937056764
1976 29.5208279888942
1977 28.9763009466552
1978 28.3834359531571
1979 27.8964636289976
1980 27.5272383172043
1981 27.1727549137655
1982 26.8727390056646
1983 26.6782354938083
1984 26.4740181035688
1985 26.214775796587
1986 25.9222048266538
1987 25.5628829524555
1988 25.2364289672751
1989 25.0599210011006
1990 24.9637772797766
1991 24.8413704354028
1992 24.8208219702407
1993 24.8585333694538
1994 24.7174846792838
1995 24.4287043159582
1996 24.1416530273672
1997 23.865924958219
1998 23.5938895674207
1999 23.4010863535836
2000 23.2875130568247
2001 23.1820444681284
2002 23.0234400517029
2003 22.7768365188526
2004 22.4749923467774
2005 22.0544493205197
2006 21.5287244241056
2007 21.0900648703075
2008 20.8764143965504
2009 20.8856322370887
2010 20.91646169263
2011 20.8197486321341
2012 20.6899506043221
2013 20.5754503131708
2014 20.428606091682
2015 20.1761314808969
2016 19.8698441496152
2017 19.5348512362062
2018 19.160013146487
2019 18.8547139556704
2020 18.7095173030717
2021 18.6286740383707
2022 18.4862636883763
2023 18.3073842616338