Annual % of total population
1960 31.995514164126828
1961 32.35393362814011
1962 32.42440579276941
1963 32.35347586014344
1964 32.09656341236459
1965 31.71618163033225
1966 31.331268010796336
1967 30.950535515855904
1968 30.55523916706287
1969 30.111127978912194
1970 29.617936017290116
1971 29.149860162047897
1972 28.728835327702917
1973 28.325824835910726
1974 27.945811242677497
1975 27.589792110881344
1976 27.27223008110054
1977 27.00273584820075
1978 26.761619665161877
1979 26.611066738924652
1980 26.573346132388018
1981 26.592437603867825
1982 26.6351907108313
1983 26.678005889394814
1984 26.741137062346034
1985 26.81371267648124
1986 26.86219372662672
1987 26.881384857504827
1988 26.86582557441609
1989 26.792235664873647
1990 26.659891914950062
1991 26.477179193636406
1992 26.257890599492086
1993 26.002846847462585
1994 25.709272293134994
1995 25.37412431143806
1996 24.99279382414089
1997 24.546950035482688
1998 24.008030547049355
1999 23.4127538945842
2000 22.810887936479855
2001 22.182322242029997
2002 21.53342084701367
2003 20.95725732297896
2004 20.486109748991833
2005 20.074957745188893
2006 19.73929052981028
2007 19.505868581109194
2008 19.396562110104558
2009 19.360434724442264
2010 19.34954829490663
2011 19.37120859476074
2012 19.4493141307899
2013 19.568665197307585
2014 19.71887263853639
2015 19.892379954566515
2016 20.06578435809463
2017 20.221272468867028
2018 20.34555613940888
2019 20.429160589096906
2020 20.48308348600031
2021 20.53202781308019
2022 20.610364698812834
2023 20.518272583095246