Year	Percent
1950	10.41101
1955	10.21396
1960	10.31823
1965	10.9331
1970	12.79987
1975	14.1682
1980	12.75114
1985	11.95895
1990	10.63695
1995	10.65914
2000	10.26632
2005	9.93203
2010	9.65556
2015	8.23118
2020	7.43579
2025	6.63918
2030	7.35234
2035	6.83479
2040	6.24517
2045	5.6952
2050	5.28463
2055	5.09529
2060	5.03409
2065	4.96813
2070	4.8029
2075	4.55499
2080	4.38072
2085	4.32123
2090	4.35411
2095	4.38432
2100	4.33543