Year	Percent
1950	23.53551
1955	24.63645
1960	25.92293
1965	26.14799
1970	26.26908
1975	25.54273
1980	24.86478
1985	25.58623
1990	26.13311
1995	26.48224
2000	27.2316
2005	27.84417
2010	28.92312
2015	30.69873
2020	31.67469
2025	31.80879
2030	31.67667
2035	31.23855
2040	31.1078
2045	31.25026
2050	31.05403
2055	30.50352
2060	29.81065
2065	29.18544
2070	28.68045
2075	28.2191
2080	27.70125
2085	27.10239
2090	26.45004
2095	25.81183
2100	25.22738