Year	Percent
1950	5.68303
1955	4.51836
1960	4.19162
1965	4.07467
1970	4.09323
1975	4.12796
1980	4.17519
1985	4.28393
1990	4.75009
1995	4.88767
2000	4.99856
2005	5.1302
2010	5.38402
2015	5.89753
2020	6.4383
2025	7.0107
2030	7.6412
2035	8.38145
2040	9.2162
2045	10.05818
2050	10.79248
2055	11.59614
2060	12.63744
2065	13.71501
2070	14.77239
2075	15.73083
2080	16.66134
2085	17.61582
2090	18.59561
2095	19.59892
2100	20.60646