Year	Percent
1950	8.63905
1955	11.28954
1960	12.38139
1965	11.95147
1970	8.9683
1975	7.8324
1980	8.28314
1985	9.14965
1990	9.35224
1995	8.03295
2000	6.99888
2005	5.64023
2010	4.96639
2015	5.55997
2020	5.32245
2025	4.87669
2030	4.47453
2035	4.23085
2040	4.11809
2045	4.21724
2050	4.35532
2055	4.35737
2060	4.248
2065	4.16948
2070	4.18578
2075	4.31287
2080	4.48199
2085	4.5909
2090	4.60423
2095	4.55907
2100	4.53979