Year	Percent
1950	27.46322
1955	27.64806
1960	28.36869
1965	27.64441
1970	24.64068
1975	26.23259
1980	30.454
1985	37.65052
1990	38.26278
1995	38.82505
2000	36.87162
2005	39.14027
2010	40.98065
2015	39.36077
2020	38.8808
2025	36.57609
2030	36.81201
2035	34.23943
2040	30.71139
2045	28.12758
2050	27.15445
2055	26.69854
2060	25.99566
2065	24.97564
2070	23.8839
2075	22.90911
2080	22.41674
2085	22.30314
2090	22.29089
2095	22.16756
2100	21.89572