Year	Percent
1950	11.16072
1955	11.42967
1960	11.09952
1965	12.65198
1970	12.60404
1975	12.55423
1980	12.62317
1985	12.35283
1990	11.78369
1995	11.4045
2000	11.23445
2005	10.82283
2010	10.25538
2015	9.51884
2020	9.22852
2025	8.87569
2030	8.42381
2035	7.96902
2040	7.541
2045	7.16013
2050	6.81768
2055	6.50219
2060	6.21527
2065	5.95481
2070	5.73156
2075	5.543
2080	5.38465
2085	5.25778
2090	5.14794
2095	5.05393
2100	4.97571