Year	Percent
1950	19.69505
1955	20.9435
1960	20.20095
1965	20.4037
1970	23.24712
1975	23.53975
1980	26.52471
1985	24.35434
1990	22.90525
1995	24.53858
2000	25.97668
2005	29.27629
2010	29.23246
2015	27.98757
2020	26.9696
2025	27.27412
2030	29.97875
2035	29.60864
2040	27.1086
2045	24.27271
2050	21.77745
2055	22.66878
2060	24.90181
2065	26.16209
2070	26.02488
2075	24.54148
2080	23.57664
2085	23.50569
2090	24.15524
2095	24.79091
2100	24.79302