Year	Percent
1950	11.21191
1955	10.5809
1960	10.63724
1965	12.07987
1970	12.01814
1975	11.79143
1980	11.59944
1985	11.55608
1990	11.44055
1995	11.02167
2000	10.06275
2005	9.28723
2010	9.06066
2015	8.51553
2020	8.06457
2025	7.67183
2030	7.12984
2035	6.70392
2040	6.28642
2045	5.99779
2050	5.75259
2055	5.56185
2060	5.37922
2065	5.20432
2070	5.05616
2075	4.95682
2080	4.88646
2085	4.84605
2090	4.80035
2095	4.75509
2100	4.70939