Year	Percent
1950	12.10568
1955	11.51497
1960	13.27905
1965	14.22893
1970	14.39913
1975	14.31452
1980	14.31057
1985	14.55943
1990	15.13947
1995	15.07737
2000	14.36819
2005	13.77016
2010	13.38414
2015	13.19282
2020	13.00546
2025	12.39008
2030	11.74579
2035	11.1784
2040	10.72225
2045	10.33026
2050	9.93836
2055	9.53178
2060	9.10351
2065	8.7165
2070	8.36154
2075	8.05981
2080	7.74694
2085	7.43406
2090	7.13777
2095	6.86343
2100	6.62665