Year	Percent
1950	10.69404
1955	11.01269
1960	11.05091
1965	11.36064
1970	11.26054
1975	11.21257
1980	11.46455
1985	12.92661
1990	10.78595
1995	9.48183
2000	8.79596
2005	9.10851
2010	8.07975
2015	7.36025
2020	6.84029
2025	6.9117
2030	6.66256
2035	6.4065
2040	6.18005
2045	5.95738
2050	5.74641
2055	5.59448
2060	5.50548
2065	5.43359
2070	5.35257
2075	5.2507
2080	5.15486
2085	5.0815
2090	5.02917
2095	4.99017
2100	4.94932