Year	Percent
1950	14.41144
1955	14.5678
1960	13.21254
1965	13.88969
1970	14.25019
1975	14.46773
1980	14.38215
1985	14.3979
1990	14.92755
1995	16.58672
2000	14.64079
2005	12.86423
2010	13.85696
2015	14.51441
2020	13.56927
2025	12.61683
2030	11.82925
2035	11.29476
2040	10.92674
2045	10.5026
2050	9.95244
2055	9.3536
2060	8.82929
2065	8.41556
2070	8.07163
2075	7.73546
2080	7.36148
2085	6.99882
2090	6.68093
2095	6.41008
2100	6.18776