Year	Percent
1950	9.70966
1955	9.40813
1960	10.13323
1965	12.18617
1970	12.20248
1975	12.05035
1980	12.28397
1985	12.19626
1990	12.16351
1995	12.22888
2000	11.04268
2005	10.00009
2010	10.03025
2015	10.20587
2020	9.08587
2025	8.09807
2030	7.74381
2035	7.55571
2040	7.39064
2045	7.13688
2050	6.8332
2055	6.53319
2060	6.33785
2065	6.25795
2070	6.22794
2075	6.18814
2080	6.1177
2085	6.04494
2090	5.99083
2095	5.97388
2100	5.97007