Year	Percent
1950	10.58635
1955	9.65654
1960	6.1249
1965	6.81678
1970	9.35857
1975	11.17927
1980	11.6855
1985	10.21206
1990	9.96561
1995	9.92098
2000	10.69751
2005	11.54564
2010	10.91903
2015	8.83499
2020	7.46059
2025	8.0909
2030	8.31847
2035	7.90332
2040	7.08057
2045	6.41127
2050	6.1677
2055	6.15268
2060	6.10192
2065	5.87524
2070	5.58862
2075	5.37501
2080	5.2976
2085	5.29487
2090	5.28492
2095	5.22199
2100	5.12165