Year	Percent
1950	11.88416
1955	12.46215
1960	11.60462
1965	10.87085
1970	11.76018
1975	12.29439
1980	12.25715
1985	11.89434
1990	11.90011
1995	12.28463
2000	12.85787
2005	12.31765
2010	11.3834
2015	10.18307
2020	10.42522
2025	10.54986
2030	10.04904
2035	9.35715
2040	8.72722
2045	8.32679
2050	8.11519
2055	7.89224
2060	7.53858
2065	7.12953
2070	6.78303
2075	6.53641
2080	6.34761
2085	6.17298
2090	5.97495
2095	5.77603
2100	5.60323