Year	Percent
1950	27.24237
1955	28.11646
1960	31.82933
1965	29.31157
1970	26.8597
1975	27.89879
1980	29.8105
1985	33.52751
1990	34.0553
1995	31.0617
2000	28.70652
2005	28.57576
2010	31.029
2015	32.32076
2020	30.46361
2025	26.96224
2030	23.69404
2035	22.09123
2040	22.49274
2045	22.66421
2050	21.50755
2055	19.90697
2060	19.04824
2065	19.04939
2070	19.52705
2075	19.92286
2080	19.86931
2085	19.48221
2090	19.17195
2095	19.21665
2100	19.52194