Year	Percent
1950	11.7169
1955	11.84042
1960	10.6266
1965	12.72592
1970	12.90273
1975	13.11857
1980	13.16287
1985	13.15028
1990	13.52921
1995	14.02432
2000	13.67861
2005	13.13975
2010	12.30804
2015	11.81827
2020	12.18261
2025	12.50109
2030	11.49805
2035	10.61126
2040	10.01043
2045	9.64006
2050	9.27517
2055	8.85147
2060	8.37963
2065	7.89216
2070	7.47757
2075	7.12855
2080	6.84553
2085	6.58638
2090	6.33106
2095	6.10998
2100	5.9176