Year	Percent
1950	9.64594
1955	12.42293
1960	10.59962
1965	9.40168
1970	8.80799
1975	7.84383
1980	6.63199
1985	6.9745
1990	6.90689
1995	6.47662
2000	6.60414
2005	5.88445
2010	5.57708
2015	5.80965
2020	5.65538
2025	5.6691
2030	5.59625
2035	5.46057
2040	5.36267
2045	5.36009
2050	5.40053
2055	5.40957
2060	5.36853
2065	5.30131
2070	5.22726
2075	5.18266
2080	5.16163
2085	5.14393
2090	5.11321
2095	5.06122
2100	5.00245