Annual % of total population
1960 30.8150597901274
1961 30.911909245413
1962 30.7465032189344
1963 30.5746264158692
1964 30.5411358051448
1965 30.5807501496956
1966 30.2536787919678
1967 29.7187676522059
1968 29.2800311264602
1969 28.7856045443276
1970 28.2838049773687
1971 27.7492804778041
1972 27.1327432942735
1973 26.455187421058
1974 25.7839546545484
1975 25.1122781429568
1976 24.4399205810557
1977 23.829136533117
1978 23.2887109682701
1979 22.8255647208831
1980 22.4725799744266
1981 22.2273317653635
1982 22.0509827661445
1983 21.883597325446
1984 21.7107495589798
1985 21.5316995876208
1986 21.3752888828725
1987 21.3186733449385
1988 21.359014985376
1989 21.4428375710267
1990 21.556647253275
1991 21.6838553496237
1992 21.7920071457062
1993 21.8585925811232
1994 21.8608729639584
1995 21.8024990164564
1996 21.720343783201
1997 21.648405466966
1998 21.5896705355766
1999 21.5255083007688
2000 21.4254043241312
2001 21.2853478322796
2002 21.1399362675084
2003 20.9923988119116
2004 20.815553884976
2005 20.6109221090081
2006 20.4194910439258
2007 20.2652113320978
2008 20.1357098160385
2009 20.0067943540569
2010 19.8668858175649
2011 19.7438057892103
2012 19.6422329152387
2013 19.5369619001623
2014 19.4233952283111
2015 19.2971595367802
2016 19.1742051083628
2017 19.0559237747833
2018 18.9110216801249
2019 18.7358999565657
2020 18.5113495341764
2021 18.2430347046008
2022 17.9594381099047
2023 17.6748321751787