Year	Percent
1950	12.84205
1955	12.62052
1960	12.56638
1965	12.74446
1970	13.13424
1975	13.57778
1980	13.82548
1985	13.69835
1990	13.8768
1995	14.59418
2000	15.8477
2005	17.38577
2010	18.68628
2015	19.61365
2020	20.30047
2025	21.12293
2030	22.05141
2035	23.08334
2040	23.84188
2045	24.52826
2050	25.13126
2055	25.55655
2060	25.95315
2065	26.0015
2070	25.81473
2075	25.47867
2080	25.11092
2085	24.72889
2090	24.33888
2095	23.95251
2100	23.59873