Year	Percent
1950	11.52705
1955	11.54324
1960	12.286
1965	12.33084
1970	12.34481
1975	12.33992
1980	12.55878
1985	12.56888
1990	12.27091
1995	13.40493
2000	14.10038
2005	13.44018
2010	12.20885
2015	11.17588
2020	11.04394
2025	10.86823
2030	10.55486
2035	9.90313
2040	9.23901
2045	8.73081
2050	8.35668
2055	7.98846
2060	7.57874
2065	7.1585
2070	6.78495
2075	6.48782
2080	6.25543
2085	6.05439
2090	5.87102
2095	5.69175
2100	5.54511