Year	Percent
1950	10.10075
1955	10.18905
1960	10.68258
1965	11.31649
1970	11.35987
1975	11.54196
1980	11.55096
1985	11.37329
1990	11.81701
1995	12.11212
2000	12.44375
2005	12.51206
2010	12.22112
2015	11.90585
2020	10.70281
2025	10.22724
2030	10.63677
2035	10.45311
2040	9.90024
2045	9.28395
2050	8.86387
2055	8.5561
2060	8.27289
2065	7.95369
2070	7.64685
2075	7.35881
2080	7.08594
2085	6.86796
2090	6.67483
2095	6.49046
2100	6.32708