Year	Percent
1950	11.53482
1955	7.2186
1960	7.87739
1965	9.37671
1970	8.75886
1975	8.01675
1980	6.79356
1985	7.13857
1990	7.19431
1995	7.49689
2000	7.07712
2005	5.80542
2010	4.65024
2015	4.35772
2020	5.41892
2025	5.65243
2030	5.52963
2035	5.22687
2040	4.88292
2045	4.75962
2050	4.9798
2055	5.302
2060	5.43554
2065	5.34238
2070	5.17803
2075	5.0974
2080	5.16147
2085	5.29906
2090	5.36875
2095	5.31332
2100	5.18244