Year	Percent
1950	11.04679
1955	11.88555
1960	9.68549
1965	7.75176
1970	7.54644
1975	7.71991
1980	8.29209
1985	6.78766
1990	5.88014
1995	5.135
2000	4.59744
2005	4.42407
2010	4.19734
2015	4.13319
2020	4.05535
2025	3.92944
2030	3.8367
2035	3.81556
2040	3.85721
2045	3.92294
2050	3.97464
2055	3.99645
2060	4.00279
2065	4.02635
2070	4.08949
2075	4.16892
2080	4.22798
2085	4.26468
2090	4.26675
2095	4.25339
2100	4.24472