Year	Percent
1950	13.41872
1955	12.78731
1960	12.01152
1965	13.21294
1970	13.96927
1975	14.19621
1980	13.96258
1985	13.89475
1990	14.07198
1995	14.55811
2000	13.74314
2005	12.79797
2010	11.54614
2015	11.64626
2020	11.66541
2025	10.99956
2030	10.16846
2035	9.41739
2040	8.93571
2045	8.64951
2050	8.33783
2055	7.91715
2060	7.45151
2065	7.06195
2070	6.78412
2075	6.57133
2080	6.37778
2085	6.16354
2090	5.95064
2095	5.76693
2100	5.63847