Year	Percent
1950	9.82048
1955	10.31199
1960	10.81113
1965	11.70941
1970	12.44609
1975	12.95874
1980	13.2734
1985	14.30127
1990	18.71037
1995	20.65772
2000	21.43049
2005	21.60361
2010	22.44713
2015	24.44617
2020	26.95629
2025	30.10749
2030	33.44915
2035	37.14683
2040	40.46364
2045	41.86501
2050	41.90395
2055	41.40516
2060	40.57756
2065	40.22607
2070	40.42577
2075	40.2512
2080	40.08001
2085	39.97795
2090	39.99525
2095	40.1618
2100	40.46066