Year	Percent
1950	17.74067
1955	16.9484
1960	15.21148
1965	14.57627
1970	14.80178
1975	14.94692
1980	15.36496
1985	16.08479
1990	16.55031
1995	16.20181
2000	17.13814
2005	21.484
2010	24.28523
2015	23.05219
2020	23.87538
2025	25.01415
2030	26.52177
2035	28.79385
2040	29.85495
2045	29.05457
2050	26.46403
2055	23.92606
2060	22.19683
2065	22.14121
2070	23.56707
2075	24.13462
2080	23.98469
2085	22.86433
2090	21.69164
2095	21.34649
2100	21.79137