Year	Percent
1950	5.39589
1955	4.9857
1960	4.66731
1965	4.47238
1970	4.37727
1975	4.37568
1980	4.42885
1985	4.50417
1990	4.94115
1995	5.45841
2000	5.75496
2005	5.77877
2010	5.87037
2015	5.73722
2020	5.64217
2025	5.63452
2030	5.75357
2035	6.14998
2040	7.17906
2045	8.83341
2050	10.53144
2055	11.75131
2060	12.87381
2065	14.49105
2070	16.40838
2075	18.16722
2080	19.76883
2085	21.26087
2090	22.74331
2095	24.27733
2100	25.81639