Year	Percent
1950	29.09387
1955	28.7346
1960	28.09527
1965	27.69906
1970	27.122
1975	27.89573
1980	28.21044
1985	27.36016
1990	27.46078
1995	26.7264
2000	27.78732
2005	29.93376
2010	31.16793
2015	32.08381
2020	32.84139
2025	33.28312
2030	33.50489
2035	33.54009
2040	33.50995
2045	33.59163
2050	33.35913
2055	32.95017
2060	32.34719
2065	31.61316
2070	30.8473
2075	30.10685
2080	29.3753
2085	28.61252
2090	27.84359
2095	27.06719
2100	26.31717