Year	Percent
1950	26.62145
1955	26.37624
1960	26.44135
1965	26.03399
1970	26.01187
1975	27.28792
1980	29.23293
1985	31.52422
1990	32.6663
1995	31.23351
2000	30.1057
2005	28.41421
2010	27.76636
2015	27.34373
2020	27.79432
2025	26.13766
2030	24.60783
2035	23.24805
2040	20.62259
2045	20.06386
2050	20.69796
2055	20.48196
2060	19.92225
2065	19.14108
2070	18.55203
2075	18.42224
2080	18.66561
2085	18.8858
2090	18.81872
2095	18.57075
2100	18.34836