Year	Percent
1950	27.4972
1955	27.306
1960	27.03345
1965	26.6604
1970	26.2643
1975	25.81959
1980	25.64349
1985	26.11113
1990	26.42781
1995	27.20457
2000	28.36856
2005	28.66562
2010	28.85506
2015	29.11791
2020	29.41943
2025	29.89443
2030	30.21372
2035	30.41533
2040	30.51566
2045	30.55171
2050	30.66113
2055	30.73442
2060	30.6895
2065	30.55735
2070	30.38847
2075	30.22422
2080	30.03259
2085	29.80742
2090	29.54635
2095	29.25461
2100	28.96434