Year	Percent
1950	27.43996
1955	27.51096
1960	27.39541
1965	27.26346
1970	27.23443
1975	26.83647
1980	26.65175
1985	26.67834
1990	26.8057
1995	27.26959
2000	27.7575
2005	27.84202
2010	28.1849
2015	28.26571
2020	28.13634
2025	28.54753
2030	29.05848
2035	29.66957
2040	30.20085
2045	30.33211
2050	30.39609
2055	30.3689
2060	30.34088
2065	30.25286
2070	30.03885
2075	29.72532
2080	29.37475
2085	29.00358
2090	28.63474
2095	28.25229
2100	27.8435