Year	Percent
1950	6.07701
1955	5.6874
1960	5.16124
1965	4.78458
1970	4.96711
1975	5.33031
1980	5.55632
1985	5.56315
1990	6.51918
1995	7.06372
2000	8.14529
2005	9.43268
2010	10.51209
2015	12.57943
2020	15.15366
2025	18.09117
2030	20.33162
2035	22.51809
2040	23.90475
2045	25.8393
2050	27.66091
2055	29.66984
2060	30.99707
2065	31.32541
2070	32.04715
2075	32.85302
2080	33.58073
2085	34.1969
2090	34.68595
2095	35.05374
2100	35.37782