2183-8453 2183-8453 S2183-84532019000100050 10.31252/rpso.29.06.2019 Portugal 30 06 2019 30 06 2019 7 50 57

1 2016 85 88-95 2 2010 19 5 5 975-85 3 Instituto Nacional de Estatística 2018 1-13 4 2015 18 372-5 5 2016 87 33-9 6 2014 79 77-85 7 2013 76 155-9 8 2014 47 281-6 9 2009 57 3 3 106-11