Year	Percent
1950	12.87165
1955	12.85577
1960	12.94716
1965	12.84895
1970	12.87892
1975	13.07466
1980	13.26612
1985	13.61557
1990	14.22191
1995	15.23071
2000	16.79908
2005	18.93327
2010	20.60892
2015	21.5787
2020	22.36988
2025	22.82719
2030	23.66878
2035	24.57072
2040	25.05478
2045	25.32554
2050	25.34682
2055	25.48161
2060	25.62927
2065	25.61289
2070	25.41589
2075	25.09134
2080	24.74227
2085	24.41866
2090	24.10024
2095	23.79994
2100	23.51298