Characteristic,Female,Male
2019,18.38,18.09
2018,18.16,17.87
2017,17.94,17.64
2016,17.72,17.41
2015,17.49,17.17
2014,17.27,16.92
2013,17.05,16.67
2012,16.83,16.42
2011,16.61,16.17
2010,16.4,15.95
2009,16.19,15.74