Year	Percent
1950	14.76064
1955	15.17727
1960	14.9944
1965	14.58464
1970	14.52728
1975	14.80988
1980	15.36913
1985	15.68026
1990	15.60315
1995	15.96352
2000	17.1777
2005	18.8516
2010	20.88068
2015	22.97815
2020	24.2876
2025	25.30593
2030	25.58158
2035	25.54611
2040	25.37928
2045	25.28197
2050	25.48149
2055	25.97855
2060	26.28994
2065	26.21187
2070	26.01719
2075	25.56839
2080	25.29057
2085	25.10934
2090	24.93746
2095	24.70683
2100	24.42964