Year	Percent
1950	10.16533
1955	10.4699
1960	10.75259
1965	9.88655
1970	9.21703
1975	9.9845
1980	10.43489
1985	10.39954
1990	10.07316
1995	10.2276
2000	10.74596
2005	11.45321
2010	10.95878
2015	10.14958
2020	9.16972
2025	9.50565
2030	9.72473
2035	9.33525
2040	8.74356
2045	8.20759
2050	7.89396
2055	7.75929
2060	7.60479
2065	7.31203
2070	6.95276
2075	6.64751
2080	6.43667
2085	6.27871
2090	6.13155
2095	5.95771
2100	5.7795