Year	Percent
1950	10.72911
1955	9.84334
1960	7.33092
1965	7.05087
1970	9.60507
1975	11.73547
1980	12.23637
1985	10.56994
1990	10.33384
1995	10.31629
2000	11.00226
2005	11.98269
2010	11.58972
2015	9.2926
2020	7.84025
2025	8.55166
2030	8.94164
2035	8.5194
2040	7.65306
2045	6.94785
2050	6.69455
2055	6.69212
2060	6.65166
2065	6.41683
2070	6.11047
2075	5.876
2080	5.78303
2085	5.76467
2090	5.73381
2095	5.64548
2100	5.51583