Year	Percent
1950	11.98809
1955	12.44191
1960	12.56451
1965	11.64733
1970	8.95556
1975	7.84114
1980	7.52737
1985	7.37969
1990	7.19801
1995	7.01222
2000	6.02811
2005	5.51045
2010	5.69461
2015	5.58416
2020	5.48118
2025	5.31486
2030	5.14102
2035	4.98822
2040	4.97715
2045	5.05768
2050	5.12615
2055	5.13959
2060	5.10423
2065	5.05785
2070	5.02947
2075	5.0329
2080	5.04112
2085	5.03686
2090	5.00557
2095	4.95826
2100	4.91504