Year	Percent
1950	10.68461
1955	11.06124
1960	10.62456
1965	11.21995
1970	11.20994
1975	11.8472
1980	13.12761
1985	13.51081
1990	13.29121
1995	12.48715
2000	11.98422
2005	10.365
2010	9.17873
2015	8.93283
2020	8.93369
2025	8.90454
2030	8.00504
2035	7.20502
2040	6.54401
2045	6.16494
2050	6.05595
2055	6.04984
2060	5.96016
2065	5.75046
2070	5.50793
2075	5.35002
2080	5.29849
2085	5.31119
2090	5.31299
2095	5.26165
2100	5.16561