Year	Percent
1950	10.7669
1955	10.43078
1960	11.34135
1965	13.36282
1970	13.34144
1975	13.92684
1980	13.59788
1985	11.02466
1990	9.6958
1995	9.03708
2000	9.19725
2005	8.35485
2010	7.70003
2015	7.89371
2020	7.21977
2025	6.87106
2030	6.32373
2035	6.04347
2040	5.91141
2045	5.77781
2050	5.58474
2055	5.36219
2060	5.18051
2065	5.05298
2070	4.97387
2075	4.8966
2080	4.80537
2085	4.69495
2090	4.59302
2095	4.52268
2100	4.48319