Year	Percent
1950	12.48849
1955	11.8241
1960	12.16199
1965	13.06099
1970	13.59398
1975	13.85691
1980	12.30461
1985	13.31816
1990	16.28988
1995	17.4521
2000	18.04134
2005	18.5363
2010	20.83715
2015	22.79378
2020	24.48209
2025	26.22234
2030	27.70325
2035	28.87714
2040	29.25628
2045	29.64815
2050	29.86343
2055	29.90586
2060	30.14014
2065	30.59079
2070	31.17674
2075	31.69546
2080	32.16085
2085	32.60907
2090	33.08534
2095	33.61002
2100	34.12326