Year	Percent
1950	11.3965
1955	11.42699
1960	11.75345
1965	11.76607
1970	11.82147
1975	11.9432
1980	12.02306
1985	12.02779
1990	12.42869
1995	14.10045
2000	12.93909
2005	12.56598
2010	10.56376
2015	8.92084
2020	8.54664
2025	8.58271
2030	8.70811
2035	7.97431
2040	7.02581
2045	6.34964
2050	6.00546
2055	5.93288
2060	5.92444
2065	5.79158
2070	5.53341
2075	5.26412
2080	5.1056
2085	5.07579
2090	5.09961
2095	5.08802
2100	5.01434