Year	Percent
1950	15.12661
1955	17.27643
1960	18.50148
1965	19.40025
1970	20.73183
1975	20.69581
1980	19.78378
1985	18.80607
1990	19.99971
1995	23.12096
2000	27.29258
2005	32.80705
2010	33.58896
2015	33.22523
2020	31.1866
2025	29.57347
2030	28.6562
2035	27.87992
2040	26.13753
2045	23.13188
2050	21.20554
2055	19.78564
2060	20.23704
2065	22.04111
2070	23.27586
2075	23.72137
2080	23.01779
2085	22.03364
2090	21.33223
2095	21.46986
2100	22.04541