;2015;2016;2017; Average duration, months;Average duration, months;Average duration, months; Family cycle phase, total;5.2;5.1;5.3; Single males total;5.1;5.1;5.2; Single males - 19 years;3.9;4.3;4.3; Single males 20 - 24 years;4.8;4.8;4.9; Single males 25 - 44 years;5.2;5.1;5.3; Single males 45 - 66 years;5.5;5.5;5.7; Single males 67 years or more;3.6;3.3;3.7; Single females total;4.9;5.0;5.2; Single females - 19 years;4.2;4.2;4.2; Single females 20 - 24 years;4.6;4.6;4.6; Single females 25 - 44 years;5.1;5.1;5.2; Single females 45 - 66 years;5.4;5.4;5.7; Single females 67 years or more;3.7;3.8;5.3; Single parents with children 0-17 years;5.3;5.2;5.6; Single males with children 0-17 years;5.1;4.9;5.2; Single females with children 0-17 years;5.4;5.3;5.6; Couples without children 0-17 years;4.8;4.8;5.0; Couples with children 0-17 years;5.9;5.7;6.0; Unknown family cycle phase;0.0;0.0;0.0;