Year	Percent
1950	10.45693
1955	11.38039
1960	13.99196
1965	13.9566
1970	13.66629
1975	13.77192
1980	13.54079
1985	13.18427
1990	12.91508
1995	11.61029
2000	10.3803
2005	10.18745
2010	10.4166
2015	9.27128
2020	8.22141
2025	7.80671
2030	7.55174
2035	7.31908
2040	7.00509
2045	6.65524
2050	6.3202
2055	6.09221
2060	5.97798
2065	5.91036
2070	5.83497
2075	5.73601
2080	5.64444
2085	5.58127
2090	5.56049
2095	5.55619
2100	5.54461