Year	Percent
1950	9.61749
1955	8.55111
1960	7.33928
1965	7.00712
1970	10.2312
1975	10.22832
1980	10.37432
1985	9.08999
1990	8.92616
1995	8.80485
2000	8.48928
2005	8.54229
2010	8.94938
2015	8.62854
2020	7.64189
2025	6.73955
2030	6.87545
2035	6.5731
2040	6.18758
2045	5.82233
2050	5.52923
2055	5.3354
2060	5.27925
2065	5.28053
2070	5.22192
2075	5.12624
2080	5.02915
2085	4.97924
2090	4.97353
2095	4.9937
2100	4.98658