Year	Percent
1950	4.67518
1955	4.69589
1960	4.85185
1965	4.96781
1970	4.87553
1975	4.36385
1980	3.47953
1985	2.77551
1990	2.68793
1995	2.65895
2000	3.52915
2005	3.97662
2010	3.55083
2015	3.05737
2020	3.47845
2025	5.02292
2030	6.86442
2035	9.68314
2040	12.64895
2045	16.06246
2050	20.50601
2055	25.25166
2060	29.11887
2065	31.83703
2070	34.72672
2075	37.48183
2080	39.44217
2085	40.02297
2090	39.64213
2095	39.02491
2100	38.50314