Year	Percent
1950	5.58611
1955	5.1707
1960	5.11441
1965	5.00261
1970	4.85249
1975	4.82548
1980	4.59648
1985	4.68361
1990	5.38421
1995	5.54035
2000	5.68506
2005	5.84888
2010	6.279
2015	7.13877
2020	8.18033
2025	9.40352
2030	10.92874
2035	12.70368
2040	14.84319
2045	17.24844
2050	19.81321
2055	22.59223
2060	25.36197
2065	27.95315
2070	30.0589
2075	31.62942
2080	33.07936
2085	34.38893
2090	35.50521
2095	36.39074
2100	37.09084