Year	Percent
1950	10.78852
1955	11.58615
1960	10.60208
1965	9.88195
1970	10.62942
1975	11.0894
1980	13.33771
1985	10.47017
1990	9.81823
1995	8.81071
2000	8.87585
2005	8.16565
2010	7.00807
2015	6.69861
2020	6.96561
2025	6.65054
2030	6.22333
2035	5.96998
2040	5.91338
2045	5.88134
2050	5.74501
2055	5.55327
2060	5.31456
2065	5.14004
2070	5.00856
2075	4.88413
2080	4.7405
2085	4.59075
2090	4.44836
2095	4.34554
2100	4.28023