Year	Percent
1950	12.67129
1955	12.02306
1960	9.11171
1965	8.98162
1970	11.63545
1975	12.1851
1980	12.35182
1985	11.90751
1990	12.04649
1995	14.41675
2000	14.96932
2005	11.77528
2010	7.91945
2015	5.86906
2020	6.02262
2025	6.82677
2030	6.4666
2035	5.56293
2040	4.63807
2045	4.17024
2050	4.19319
2055	4.38157
2060	4.37849
2065	4.13718
2070	3.8671
2075	3.76857
2080	3.89825
2085	4.12169
2090	4.26219
2095	4.23537
2100	4.12213