Year	Percent
1950	27.46879
1955	28.76872
1960	29.50982
1965	29.82876
1970	29.52792
1975	27.87782
1980	26.9359
1985	26.62813
1990	26.64228
1995	27.25184
2000	27.41004
2005	27.412
2010	27.87739
2015	28.70189
2020	29.67353
2025	30.48465
2030	31.01942
2035	31.35116
2040	31.57869
2045	31.80727
2050	31.87516
2055	31.79007
2060	31.56656
2065	31.2836
2070	31.00189
2075	30.73028
2080	30.43801
2085	30.09559
2090	29.71051
2095	29.30028
2100	28.87489