Year	Percent
1950	11.28899
1955	11.73641
1960	11.77972
1965	12.13372
1970	12.549
1975	12.95519
1980	13.75458
1985	14.03939
1990	16.85785
1995	16.41925
2000	16.18374
2005	16.66353
2010	18.37316
2015	20.557
2020	22.88147
2025	24.77527
2030	25.85754
2035	26.40629
2040	26.7257
2045	27.16268
2050	27.83033
2055	28.69478
2060	29.34188
2065	29.98162
2070	30.66673
2075	31.04979
2080	31.50463
2085	32.0101
2090	32.50024
2095	32.96444
2100	33.40464