Year % of total population 1960 10.622789992590807 1961 10.888046162050316 1962 11.057290461830297 1963 11.164291138274377 1964 11.28742864969842 1965 11.423613386717323 1966 11.534089416211 1967 11.633025816794147 1968 11.734017141922166 1969 11.83299074516254 1970 11.932869541519239 1971 12.032008434207993 1972 12.154227078895198 1973 12.285113673838888 1974 12.425064213349197 1975 12.58054232478779 1976 12.73689791136968 1977 12.907202474427786 1978 13.088717264497028 1979 13.275315685263152 1980 13.45744188408116 1981 13.594074884626353 1982 13.708594723349108 1983 13.846160598662497 1984 13.995803039272094 1985 14.151832205333237 1986 14.31053930665838 1987 14.466363758824222 1988 14.632543547045293 1989 14.807172871390895 1990 14.991766684600277 1991 15.216800155332237 1992 15.448979318167455 1993 15.699363614491077 1994 15.97257633133595 1995 16.268359904945292 1996 16.58511162899859 1997 16.92179216221269 1998 17.28581688737544 1999 17.684533919288402 2000 18.121954805645004 2001 18.429017263479437 2002 18.673144523353532 2003 18.925427511999935 2004 19.18067077657802 2005 19.44746076646874 2006 19.731243956848626 2007 20.031964906487453 2008 20.350612595274157 2009 20.67520142868412 2010 21.011393275055514 2011 21.300473612011125 2012 21.558501249748286 2013 21.81368899228003 2014 22.078483728698593 2015 22.353667083377943 2016 22.638418935819114 2017 22.932789478985935 2018 23.251427648614875 2019 23.55831227917257 2020 23.888802652879036 2021 24.248651303028563 2022 24.654253178746075 2023 25.01442496880741