Year	Percent
1950	28.17437
1955	29.09635
1960	29.66272
1965	29.27902
1970	27.76003
1975	26.89575
1980	27.4027
1985	28.82336
1990	31.1369
1995	33.09398
2000	34.1494
2005	33.903
2010	33.63308
2015	32.41753
2020	31.16771
2025	30.09808
2030	29.46168
2035	29.21659
2040	28.8478
2045	28.14684
2050	27.43717
2055	26.55739
2060	25.93982
2065	25.47255
2070	25.04264
2075	24.57202
2080	24.07735
2085	23.62674
2090	23.26986
2095	23.00199
2100	22.78366