Year	Percent
1950	19.88825
1955	22.1311
1960	21.4767
1965	20.92077
1970	22.28389
1975	22.88814
1980	25.45355
1985	24.36553
1990	22.10086
1995	22.4182
2000	22.85341
2005	25.59908
2010	27.23564
2015	27.22855
2020	26.71072
2025	26.02691
2030	26.48213
2035	26.57663
2040	25.03685
2045	22.98513
2050	21.86843
2055	22.0367
2060	23.22701
2065	24.47488
2070	24.1544
2075	22.82038
2080	22.26753
2085	22.50686
2090	22.99819
2095	23.14084
2100	22.76227