Year	Percent
1950	11.65018
1955	7.2196
1960	7.81068
1965	10.10327
1970	11.24688
1975	10.93142
1980	9.4374
1985	8.54907
1990	8.41457
1995	8.68998
2000	9.50751
2005	8.46968
2010	6.66299
2015	6.03922
2020	7.02757
2025	7.71488
2030	7.14587
2035	6.52319
2040	6.11676
2045	6.0748
2050	6.27349
2055	6.42447
2060	6.29515
2065	5.98192
2070	5.7236
2075	5.64592
2080	5.69381
2085	5.73083
2090	5.65899
2095	5.48952
2100	5.33478