Year	Percent
1950	9.04797
1955	8.48626
1960	8.36928
1965	10.82983
1970	11.24528
1975	11.38406
1980	12.17286
1985	11.4417
1990	10.55567
1995	10.14898
2000	7.48977
2005	7.36432
2010	7.72124
2015	7.60138
2020	7.00872
2025	6.19319
2030	5.74404
2035	5.13687
2040	5.2463
2045	5.62667
2050	5.74017
2055	5.51697
2060	5.19213
2065	4.959
2070	4.92167
2075	5.04097
2080	5.11387
2085	5.03368
2090	4.84836
2095	4.70182
2100	4.66652