Year	Percent
1950	14.49025
1955	12.76982
1960	11.87053
1965	11.20761
1970	11.40276
1975	11.80993
1980	11.55658
1985	11.18555
1990	10.63743
1995	11.55677
2000	11.7218
2005	12.88681
2010	14.8858
2015	16.85354
2020	18.58492
2025	20.22513
2030	21.08518
2035	21.48841
2040	21.92696
2045	22.22125
2050	22.99042
2055	24.14326
2060	25.01069
2065	25.60778
2070	25.75675
2075	25.54663
2080	25.48078
2085	25.49999
2090	25.47439
2095	25.2704
2100	24.90515