Year	Percent
1950	9.47856
1955	8.58931
1960	8.68628
1965	10.12006
1970	10.92913
1975	11.44639
1980	11.24016
1985	10.08893
1990	9.71218
1995	7.66836
2000	7.48387
2005	7.03408
2010	6.83409
2015	6.47006
2020	6.4423
2025	6.24581
2030	6.13186
2035	6.01072
2040	5.92415
2045	5.85943
2050	5.82462
2055	5.81122
2060	5.7967
2065	5.75852
2070	5.70983
2075	5.64744
2080	5.59679
2085	5.55165
2090	5.51615
2095	5.47489
2100	5.42751