Year	Percent
1950	8.68379
1955	9.40486
1960	8.5451
1965	8.41678
1970	8.92708
1975	8.58973
1980	7.96188
1985	6.58601
1990	5.59185
1995	5.2071
2000	5.06206
2005	4.87241
2010	4.94485
2015	4.99339
2020	4.581
2025	4.38171
2030	4.29839
2035	4.34434
2040	4.45494
2045	4.55481
2050	4.59204
2055	4.57993
2060	4.58302
2065	4.63823
2070	4.72497
2075	4.79464
2080	4.82066
2085	4.80151
2090	4.75622
2095	4.72322
2100	4.71178