Annual % of total population
1960 23.08215676422649
1961 22.964794457586393
1962 22.813829267991647
1963 22.657188156154056
1964 22.496148495784976
1965 22.34006047953696
1966 22.173564127938754
1967 21.998189507439207
1968 21.874037055032613
1969 21.788482950334327
1970 21.70240171333235
1971 21.58045309621435
1972 21.334969733706725
1973 21.098335577565063
1974 20.944401120247065
1975 20.882336137565026
1976 20.801847855898963
1977 20.677472078092816
1978 20.578223174019033
1979 20.497799501286522
1980 20.382722781962567
1981 20.23412179882701
1982 20.230811682910534
1983 20.274732177452524
1984 20.287249746542784
1985 20.28893646187005
1986 20.287262770955195
1987 20.285649935191177
1988 20.2681707303729
1989 20.188220669232255
1990 20.046054559544665
1991 19.85817724581816
1992 19.653911400104253
1993 19.50545895565858
1994 19.443448295501657
1995 19.42662297418384
1996 19.41333961216567
1997 19.404229973214242
1998 19.395849633229613
1999 19.371023997525626
2000 19.337380482167905
2001 19.30892097564712
2002 19.481110825014287
2003 19.655779535187367
2004 19.80599282963243
2005 19.94444707103174
2006 20.037222561724473
2007 20.142506401372216
2008 20.316346964536184
2009 20.501495627102052
2010 20.69311730008499
2011 20.866354777008507
2012 21.01639254419133
2013 21.138589803112637
2014 21.221020982509973
2015 21.23158517958337
2016 21.250916253198586
2017 21.35199667726278
2018 21.49813342448935
2019 21.56931593978324
2020 21.64375278124686
2021 21.7167718294642
2022 21.677231796896454
2023 21.629305297423464