Year	Percent
1950	29.61046
1955	27.97553
1960	27.11603
1965	24.50184
1970	20.93574
1975	23.40326
1980	25.90732
1985	30.27235
1990	31.93107
1995	34.19814
2000	33.44876
2005	35.89313
2010	33.72682
2015	30.8805
2020	27.41385
2025	24.42154
2030	23.53739
2035	24.44295
2040	25.74018
2045	26.35258
2050	25.75562
2055	24.30197
2060	23.60544
2065	23.77738
2070	24.08766
2075	23.95953
2080	23.31651
2085	22.50604
2090	21.92885
2095	21.72082
2100	21.71612