Year	Percent
1950	4.60863
1955	4.47879
1960	4.74929
1965	5.17395
1970	5.47364
1975	5.70196
1980	5.68825
1985	5.46377
1990	5.72009
1995	5.69417
2000	5.77906
2005	5.92448
2010	5.93727
2015	6.45457
2020	7.05825
2025	7.81419
2030	8.56469
2035	9.20724
2040	10.35705
2045	12.27721
2050	14.16059
2055	15.84666
2060	17.37404
2065	18.64703
2070	19.82825
2075	20.8387
2080	21.8358
2085	22.77406
2090	23.63324
2095	24.4243
2100	25.16827