Year	Percent
1950	29.60575
1955	28.20513
1960	28.04527
1965	24.66159
1970	20.68886
1975	22.57078
1980	24.90405
1985	29.5136
1990	31.37465
1995	33.91888
2000	33.27687
2005	35.45467
2010	31.85125
2015	30.011
2020	26.29537
2025	23.30345
2030	22.55226
2035	23.44828
2040	24.53551
2045	24.90612
2050	24.21783
2055	22.83258
2060	22.2315
2065	22.48045
2070	22.87509
2075	22.84425
2080	22.30755
2085	21.58897
2090	21.06804
2095	20.89386
2100	20.90864