Year	Percent
1950	10.10642
1955	10.67481
1960	10.85568
1965	11.13354
1970	11.44378
1975	11.62334
1980	12.00163
1985	12.35637
1990	15.89848
1995	16.30735
2000	16.26695
2005	17.02727
2010	17.86865
2015	19.93352
2020	22.32899
2025	24.65268
2030	26.40633
2035	27.82994
2040	29.1242
2045	30.43857
2050	31.49869
2055	32.95636
2060	33.69374
2065	34.40135
2070	35.45953
2075	36.43465
2080	37.18709
2085	37.83978
2090	38.37156
2095	38.84444
2100	39.33787