Year	Percent
1950	11.56389
1955	10.83726
1960	12.46351
1965	13.46246
1970	13.69509
1975	12.76221
1980	12.26399
1985	12.48436
1990	13.34177
1995	15.43167
2000	14.90643
2005	11.7692
2010	12.17417
2015	12.21857
2020	12.42765
2025	11.91694
2030	11.15598
2035	10.41662
2040	9.932
2045	9.64997
2050	9.32018
2055	8.82268
2060	8.24006
2065	7.71935
2070	7.32169
2075	6.99845
2080	6.70909
2085	6.39908
2090	6.10918
2095	5.86748
2100	5.69161