Year	Percent
1950	10.55846
1955	9.33117
1960	7.88232
1965	8.22654
1970	8.22905
1975	7.9914
1980	7.10316
1985	7.76781
1990	7.03141
1995	8.09987
2000	8.71784
2005	6.78529
2010	4.68337
2015	5.25778
2020	6.20281
2025	6.08021
2030	5.87905
2035	5.60896
2040	5.18305
2045	5.02273
2050	5.33046
2055	5.69383
2060	5.7648
2065	5.59445
2070	5.36148
2075	5.22249
2080	5.26873
2085	5.41296
2090	5.50088
2095	5.44645
2100	5.30283