Year % of total population 1960 49.624174553422 1961 48.9485113435053 1962 49.0905701579186 1963 49.2163632299247 1964 49.329590795212 1965 49.4630857982413 1966 49.6197183098592 1967 49.7657881370281 1968 49.9063802727337 1969 50.0274949592575 1970 50.075654887621 1971 50.2272287038279 1972 50.5063898214235 1973 50.752696828208 1974 50.9706372611873 1975 51.18719889883 1976 51.4000377750496 1977 51.6036642193076 1978 51.8053254632626 1979 52.0018676316097 1980 52.0747102649007 1981 52.0412425752157 1982 52.0090947503974 1983 51.9628417691933 1984 51.9099019172951 1985 51.8476725017662 1986 51.7691039679736 1987 51.6779382376973 1988 51.583392673471 1989 51.4923817559184 1990 51.4148085613547 1991 51.4271848506457 1992 51.5132712857635 1993 51.5899122807018 1994 51.6664880505841 1995 51.755369536219 1996 51.8507899188577 1997 51.9459280616344 1998 52.0455140921511 1999 52.1437116863123 2000 52.2401441974396 2001 52.2748736181323 2002 52.2459967509863 2003 52.2118037431959 2004 52.1757867026409 2005 52.1473314488031 2006 52.1292975571286 2007 52.121456805656 2008 52.1299374542176 2009 52.1654597199132 2010 52.1979989071244 2011 52.2193780811528 2012 52.2577381577315 2013 52.3064060427838 2014 52.3703123337493 2015 52.4585858389347 2016 52.5655811407796 2017 52.6857860993019 2018 52.814087702856 2019 52.942693352905 2020 53.0863582963302 2021 53.2355556443636 2022 53.3856130297089 2023 53.5341772151899