Year	Percent
1950	11.32061
1955	10.54131
1960	10.22379
1965	12.77802
1970	12.41697
1975	12.31578
1980	12.11465
1985	12.48617
1990	12.88639
1995	12.77672
2000	12.90292
2005	12.69472
2010	12.53075
2015	12.85413
2020	13.18442
2025	12.90876
2030	12.5272
2035	12.25144
2040	12.02547
2045	11.76827
2050	11.46646
2055	11.11799
2060	10.74716
2065	10.38554
2070	10.04364
2075	9.72425
2080	9.41392
2085	9.1013
2090	8.80073
2095	8.5196
2100	8.24641