Year	Percent
1950	10.61987
1955	10.21911
1960	9.52211
1965	9.07084
1970	10.99283
1975	10.97334
1980	11.10673
1985	10.93415
1990	11.14884
1995	11.70458
2000	12.11232
2005	11.6985
2010	10.07596
2015	7.57042
2020	6.72337
2025	8.24272
2030	9.47009
2035	8.52389
2040	7.488
2045	6.6064
2050	6.17684
2055	6.18681
2060	6.36812
2065	6.40178
2070	6.11403
2075	5.69392
2080	5.41414
2085	5.33717
2090	5.37883
2095	5.40463
2100	5.33537