Year	Percent
1950	11.79127
1955	11.87892
1960	13.65162
1965	13.56542
1970	13.4156
1975	13.07374
1980	12.90294
1985	12.66544
1990	12.7536
1995	12.30714
2000	11.66602
2005	11.10415
2010	10.54883
2015	9.86654
2020	8.8391
2025	8.41677
2030	7.99384
2035	7.5877
2040	7.13799
2045	6.69714
2050	6.36085
2055	6.13932
2060	5.95746
2065	5.78225
2070	5.62399
2075	5.48725
2080	5.3824
2085	5.30796
2090	5.2506
2095	5.18677
2100	5.12231