Year	Percent
1950	11.9937
1955	12.93254
1960	14.09298
1965	15.1217
1970	15.93433
1975	16.65701
1980	17.35227
1985	17.88599
1990	21.01408
1995	20.10421
2000	19.38453
2005	19.81217
2010	21.00061
2015	21.80851
2020	23.18446
2025	24.5968
2030	26.31149
2035	27.59665
2040	28.09523
2045	28.64989
2050	29.37387
2055	30.10173
2060	30.72967
2065	31.19621
2070	31.81053
2075	32.29651
2080	32.90695
2085	33.54551
2090	34.16099
2095	34.75252
2100	35.31953