Year	Percent
1950	32.98766
1955	31.90772
1960	30.59057
1965	29.39912
1970	28.69316
1975	28.66632
1980	28.33228
1985	28.02189
1990	27.66807
1995	27.64289
2000	28.67149
2005	29.14963
2010	29.60031
2015	29.5589
2020	28.48113
2025	28.01415
2030	27.51619
2035	27.07679
2040	26.76474
2045	26.2363
2050	25.65471
2055	24.99177
2060	24.39183
2065	23.87323
2070	23.41589
2075	22.98946
2080	22.57649
2085	22.1851
2090	21.82314
2095	21.51576
2100	21.25433