Year	Percent
1950	7.83328
1955	7.21776
1960	7.0802
1965	6.72577
1970	6.73487
1975	6.86766
1980	6.8898
1985	6.98517
1990	8.24528
1995	9.54619
2000	10.55049
2005	12.31698
2010	15.00317
2015	17.83042
2020	21.12892
2025	24.36423
2030	26.61444
2035	28.4757
2040	30.23524
2045	32.38053
2050	34.13632
2055	36.40384
2060	39.63241
2065	40.95979
2070	40.93163
2075	41.44296
2080	41.88285
2085	42.38017
2090	42.78265
2095	42.8768
2100	42.73861