Year	Percent
1950	13.85678
1955	14.18214
1960	15.13715
1965	13.83543
1970	13.09957
1975	9.85377
1980	7.93564
1985	7.40012
1990	8.46514
1995	7.73368
2000	8.04707
2005	7.33673
2010	6.95099
2015	6.44138
2020	5.33268
2025	5.35073
2030	5.56516
2035	5.8088
2040	5.77201
2045	5.50878
2050	5.23195
2055	5.13618
2060	5.23295
2065	5.35085
2070	5.3425
2075	5.20266
2080	5.03397
2085	4.94743
2090	4.96319
2095	5.02792
2100	5.04813