Year	Percent
1950	6.24325
1955	5.81316
1960	5.2722
1965	4.96365
1970	5.19528
1975	5.72295
1980	6.56057
1985	7.10797
1990	8.05841
1995	8.87485
2000	9.73404
2005	10.60226
2010	12.02494
2015	14.63461
2020	16.6597
2025	19.69662
2030	23.65925
2035	26.887
2040	28.28599
2045	29.81632
2050	33.11799
2055	34.59324
2060	34.7153
2065	34.85059
2070	35.44167
2075	36.42808
2080	37.12182
2085	37.38104
2090	37.44951
2095	37.52061
2100	37.66269