Year % of total population 1960 49.1134399752695 1961 49.1201279742162 1962 49.1280046118808 1963 49.1359872403707 1964 49.1450319277964 1965 49.1539764661354 1966 49.1609689944969 1967 49.1696268724369 1968 49.1831517316903 1969 49.1985313607143 1970 49.2147929041963 1971 49.2320475200923 1972 49.2490907721986 1973 49.2667688857359 1974 49.2850501030049 1975 49.3003553724508 1976 49.3104040211621 1977 49.3164241573804 1978 49.3188086213116 1979 49.3177150454592 1980 49.3129262282056 1981 49.3050289518441 1982 49.295823607391 1983 49.2854602300127 1984 49.2741103820184 1985 49.2626092756637 1986 49.2510252110534 1987 49.2391657943065 1988 49.2273280782009 1989 49.214248472191 1990 49.1988730103792 1991 49.1820393013385 1992 49.1644476956522 1993 49.145780876832 1994 49.1259327929737 1995 49.1042645712662 1996 49.0815181809765 1997 49.0585436242593 1998 49.0332106996218 1999 49.0062321726315 2000 48.9792191737758 2001 48.9518601990335 2002 48.9238906770724 2003 48.8947239185047 2004 48.8649640630241 2005 48.8351444035989 2006 48.8074451467269 2007 48.7832478035126 2008 48.7607738659568 2009 48.7397601639913 2010 48.7216080635957 2011 48.706963543481 2012 48.6950395987013 2013 48.6846121917506 2014 48.6747828927372 2015 48.6655842436927 2016 48.6561558642951 2017 48.6446230103578 2018 48.6317293170362 2019 48.619012369157 2020 48.6101011442706 2021 48.6047149512172 2022 48.5994664760204 2023 48.5939921754669