Year	Percent
1950	12.78297
1955	11.52902
1960	11.8701
1965	13.11616
1970	13.75086
1975	13.70695
1980	13.17954
1985	12.51789
1990	11.9081
1995	11.6625
2000	11.24983
2005	10.86311
2010	10.08774
2015	9.80833
2020	9.41037
2025	8.96287
2030	8.42724
2035	7.93203
2040	7.49077
2045	7.09026
2050	6.72063
2055	6.38291
2060	6.08075
2065	5.81578
2070	5.59337
2075	5.41045
2080	5.26149
2085	5.13064
2090	5.02474
2095	4.93696
2100	4.86986