Year	Percent
1950	3.0464
1955	4.20944
1960	5.46312
1965	5.36938
1970	5.69542
1975	7.02469
1980	8.60643
1985	8.01049
1990	8.05366
1995	8.59871
2000	8.77398
2005	8.9719
2010	10.84071
2015	14.59987
2020	19.02086
2025	22.7371
2030	24.39884
2035	26.07697
2040	27.20816
2045	29.8574
2050	32.44428
2055	33.71212
2060	33.65571
2065	32.54438
2070	31.78549
2075	31.86377
2080	32.44044
2085	32.99705
2090	33.44074
2095	33.77285
2100	34.14834