Year	Percent
1950	20.4297
1955	17.01693
1960	12.75432
1965	11.29846
1970	12.48567
1975	13.22016
1980	14.38549
1985	13.66019
1990	11.81909
1995	12.4925
2000	14.12932
2005	16.8391
2010	18.76097
2015	19.68032
2020	20.43607
2025	21.88551
2030	24.63294
2035	27.10548
2040	27.82482
2045	27.02946
2050	26.37162
2055	26.28244
2060	27.16213
2065	28.14124
2070	27.85664
2075	26.92491
2080	26.21141
2085	26.06068
2090	26.16682
2095	26.07564
2100	25.64564