Indicator 3..2.1: proportion of births attended by skilled health personnel [online database]. Wiesbaden: Statistisches Bundesamt (DESTATIS); 2019 (https://sustainabledevelopment-germany.github.io/en/3-1-2/, accessed 30 January 2020). 

Source for sample size: 
Live births and difference to the previous year [online database]. Wiesbaden: Statistisches Bundesamt (DESTATIS); 2019 (https://www.destatis.de/EN/Themes/Society-Environment/Population/Births/Tables/live-birth-difference.html;jsessionid=E7096D28FE065513E5F04C559D739AAF.internet721, accessed 30 January 2020).