Year	Percent
1950	29.82312
1955	29.67009
1960	29.14529
1965	28.36954
1970	27.37986
1975	25.75955
1980	24.66338
1985	24.36467
1990	24.80724
1995	25.79385
2000	27.42255
2005	29.9672
2010	32.94632
2015	33.82204
2020	31.95179
2025	30.10154
2030	29.31956
2035	29.88474
2040	30.66181
2045	31.05522
2050	30.78168
2055	29.93208
2060	29.25349
2065	28.94857
2070	28.78555
2075	28.53667
2080	28.09153
2085	27.49278
2090	26.85935
2095	26.30572
2100	25.84701