Year	Percent
1950	10.74564
1955	10.62854
1960	9.52556
1965	8.65798
1970	9.6475
1975	10.76445
1980	11.08478
1985	11.1985
1990	11.09967
1995	10.90972
2000	10.66385
2005	9.87189
2010	9.24825
2015	8.90503
2020	8.83415
2025	8.35414
2030	8.35437
2035	7.87564
2040	7.49712
2045	7.23013
2050	7.06254
2055	6.92312
2060	6.75566
2065	6.57504
2070	6.39723
2075	6.25446
2080	6.14963
2085	6.07541
2090	5.99236
2095	5.90711
2100	5.82089