Year	Percent
1950	7.96214
1955	8.93513
1960	13.04971
1965	14.33088
1970	15.05911
1975	13.42614
1980	12.99632
1985	12.74701
1990	13.12317
1995	13.56498
2000	12.66427
2005	10.35541
2010	8.68721
2015	9.2112
2020	9.23232
2025	8.60582
2030	7.61198
2035	6.81457
2040	6.46769
2045	6.35403
2050	6.21192
2055	5.91081
2060	5.57029
2065	5.31525
2070	5.20184
2075	5.16915
2080	5.13766
2085	5.06206
2090	4.95277
2095	4.85922
2100	4.81653