Year	Percent
1950	2.7961
1955	3.18812
1960	3.56096
1965	3.9047
1970	4.18362
1975	4.38885
1980	4.53013
1985	4.63185
1990	4.95951
1995	4.98295
2000	4.90515
2005	4.84084
2010	4.82324
2015	4.92638
2020	5.25362
2025	5.68727
2030	6.21034
2035	6.81918
2040	7.4688
2045	8.13173
2050	8.79776
2055	9.44266
2060	10.08754
2065	10.76248
2070	11.52862
2075	12.4149
2080	13.2923
2085	14.13771
2090	14.9541
2095	15.75921
2100	16.58705