Year	Percent
1950	14.03202
1955	13.45918
1960	12.90732
1965	14.12785
1970	14.61586
1975	15.90533
1980	15.55025
1985	14.34224
1990	13.35098
1995	12.76673
2000	12.05626
2005	12.48323
2010	11.96239
2015	11.68331
2020	12.5535
2025	11.48299
2030	10.40579
2035	9.90495
2040	9.75673
2045	9.83284
2050	9.68476
2055	9.16533
2060	8.45594
2065	7.87084
2070	7.58907
2075	7.46089
2080	7.28918
2085	6.94909
2090	6.52356
2095	6.14016
2100	5.90469