Year % of total population 1960 3.39705094202201 1961 3.2896623078745 1962 3.16582636157128 1963 3.03925417075564 1964 2.91236822207351 1965 2.80602999575895 1966 2.70922820169079 1967 2.61946023243695 1968 2.54617187332029 1969 2.48332807103151 1970 2.34096282423924 1971 2.15633018148486 1972 2.00993676603433 1973 1.88629117959617 1974 1.78054038075957 1975 1.6868075244946 1976 1.60220483860648 1977 1.52612616181691 1978 1.45408796770426 1979 1.38093006821115 1980 1.31176552213818 1981 1.24810732264787 1982 1.18631001126011 1983 1.12526838036704 1984 1.06707711039194 1985 1.01593878674988 1986 0.9975727647465 1987 1.01650515487266 1988 1.04393504673748 1989 1.07098809896099 1990 1.10058425378871 1991 1.13333282218165 1992 1.16435122561891 1993 1.1879668463842 1994 1.20525482716093 1995 1.21910382280287 1996 1.22755025596794 1997 1.23648951762742 1998 1.24776784753807 1999 1.2546021372831 2000 1.25197968222907 2001 1.23749504663164 2002 1.21202688501098 2003 1.17985292418228 2004 1.15419693075397 2005 1.12871298794641 2006 1.08520678580577 2007 1.02508861358551 2008 0.959372419773901 2009 0.893884862487731 2010 0.858095708587698 2011 0.899942161817765 2012 0.989447225633114 2013 1.03984253504236 2014 1.00410279776443 2015 0.984915549232835 2016 1.04384459414157 2017 1.09974925827541 2018 1.12922032202613 2019 1.17193608657629 2020 1.25582119885451 2021 1.39565551374787 2022 1.52013526660389 2023 1.61136596314743