Year	Percent
1950	28.5214
1955	27.59799
1960	27.41778
1965	26.92053
1970	26.93703
1975	27.29912
1980	26.75454
1985	27.27333
1990	27.62547
1995	27.59646
2000	26.60025
2005	25.74624
2010	25.7635
2015	26.58443
2020	27.44034
2025	28.06768
2030	28.62651
2035	29.11264
2040	29.63477
2045	30.23788
2050	30.71243
2055	31.07472
2060	31.19119
2065	31.19886
2070	31.14256
2075	31.01071
2080	30.80157
2085	30.50036
2090	30.12486
2095	29.71888
2100	29.30349