Year	Percent
1950	30.5386
1955	30.2151
1960	29.61782
1965	29.31905
1970	29.50738
1975	29.69685
1980	33.34844
1985	33.05454
1990	33.06009
1995	32.35135
2000	22.98168
2005	24.02668
2010	25.27905
2015	24.20002
2020	27.54925
2025	28.63359
2030	30.42728
2035	31.78486
2040	31.55444
2045	32.10819
2050	32.33049
2055	32.29426
2060	32.14182
2065	31.66758
2070	30.96825
2075	30.25594
2080	29.59967
2085	28.99752
2090	28.37877
2095	27.67564
2100	26.92481