Year	Percent
1950	29.23329
1955	29.584
1960	28.77956
1965	26.15234
1970	24.96794
1975	25.8568
1980	26.83695
1985	26.89775
1990	27.10656
1995	27.94192
2000	31.0683
2005	36.72535
2010	40.44893
2015	40.5517
2020	36.59777
2025	30.8552
2030	26.86765
2035	26.07654
2040	26.47245
2045	25.9308
2050	23.75083
2055	21.15214
2060	19.67716
2065	19.63376
2070	20.3627
2075	20.89897
2080	20.72564
2085	20.04065
2090	19.48712
2095	19.48221
2100	19.91107