Year	Percent
1950	26.61959
1955	27.82232
1960	30.76226
1965	33.62227
1970	33.032
1975	29.20643
1980	30.36828
1985	29.83729
1990	32.87759
1995	36.80444
2000	34.14949
2005	33.38226
2010	30.66341
2015	28.77322
2020	29.32306
2025	28.85581
2030	27.79459
2035	26.40568
2040	25.51532
2045	25.03131
2050	25.01677
2055	24.84387
2060	24.29712
2065	23.59073
2070	23.04237
2075	22.79877
2080	22.75134
2085	22.66339
2090	22.3914
2095	22.00753
2100	21.68914