Year	Percent
1950	13.86078
1955	14.0614
1960	14.90658
1965	14.87715
1970	14.9785
1975	15.19863
1980	15.14876
1985	15.22165
1990	15.37496
1995	15.6151
2000	16.01867
2005	16.02683
2010	16.0654
2015	15.76671
2020	15.26945
2025	14.803
2030	14.29038
2035	13.75662
2040	13.15824
2045	12.51378
2050	11.88643
2055	11.28619
2060	10.7254
2065	10.18756
2070	9.66966
2075	9.18447
2080	8.73212
2085	8.3082
2090	7.91639
2095	7.55002
2100	7.21236