Year	Percent
1950	32.89269
1955	27.9775
1960	26.7057
1965	24.21013
1970	26.19393
1975	28.32676
1980	29.17571
1985	30.21647
1990	29.76042
1995	29.16418
2000	29.36811
2005	29.84281
2010	29.52189
2015	28.24491
2020	27.44572
2025	27.15048
2030	27.47197
2035	28.35696
2040	28.47812
2045	28.17332
2050	27.49679
2055	26.55835
2060	26.14728
2065	26.04281
2070	25.9351
2075	25.60241
2080	25.01046
2085	24.30001
2090	23.67518
2095	23.21564
2100	22.89425