Year	Percent
1950	30.4866
1955	29.37847
1960	28.39146
1965	27.5101
1970	27.06598
1975	27.47963
1980	25.15855
1985	26.04129
1990	27.42259
1995	27.64057
2000	27.84285
2005	28.54004
2010	31.12641
2015	33.4365
2020	34.40424
2025	34.23633
2030	33.65157
2035	32.59513
2040	31.8205
2045	31.1369
2050	30.01386
2055	28.81993
2060	27.63299
2065	26.58306
2070	25.6797
2075	24.88172
2080	24.17067
2085	23.559
2090	23.05138
2095	22.64349
2100	22.32251