Year	Percent
1950	29.71408
1955	29.2792
1960	29.67768
1965	26.03956
1970	22.86541
1975	23.32946
1980	24.53711
1985	27.56904
1990	28.87589
1995	28.8177
2000	29.22875
2005	30.34733
2010	31.98958
2015	32.55212
2020	32.42696
2025	30.87008
2030	29.47338
2035	29.549
2040	29.89622
2045	30.36494
2050	29.79286
2055	28.63799
2060	27.89322
2065	27.66238
2070	27.59247
2075	27.24689
2080	26.52568
2085	25.6852
2090	25.02044
2095	24.57595
2100	24.18061