I said it before (8. Aug. 2015 on Wikidata-l) we should have a way to include statistics in the JSONstat format. The list of bureaus publishing in this format is increasing.
National Institute for Statistics of Italy http://apistat.istat.it/?q=help, Statistics Norway https://data.ssb.no/api/?lang=en, UK’s Office for National Statistics https://www.nomisweb.co.uk/api/v01/help, Statistics Sweden https://www.scb.se/en/About-us/about-the-website-and-terms-of-use/open-data-api/api-for-the-statistical-database/, Statistics Denmark https://www.dst.dk/en/Statistik/statistikbanken/api, Statistics Greenland https://bank.stat.gl/pxweb/en/Greenland/, Statistics Finland https://pxnet2.stat.fi/api1.html, Instituto Galego de Estatística https://www.ige.eu/web/mostrar_paxina.jsp?paxina=004015&idioma=gl, Central Statistics Office of Ireland https://www.cso.ie/webserviceclient/, United Nations Economic Commission for Europe http://w3.unece.org/PXWeb/en, Eurostat https://ec.europa.eu/eurostat/web/json-and-unicode-web-services/about-this-service, Statistics Iceland https://px.hagstofa.is/pxen/pxweb/en/, Statistics Faroe Islands https://statbank.hagstova.fo/pxweb/en/H2/, Statistics and Research Åland https://pxweb.asub.ax/PXWeb/pxweb/en/Statistik/, Swedish Board of Agriculture http://statistik.sjv.se/PXWeb/pxweb/sv/Jordbruksverkets%20statistikdatabas/, Statistical Institute of the Balearic Islands https://ibestat.caib.es/, Swiss Federal Statistical Office https://www.pxweb.bfs.admin.ch/pxweb/en/, Croatian Bureau of Statistics https://www.dzs.hr/default_e.htm, Statistical Committee of the Republic of Armenia http://armstatbank.am/pxweb/en/ArmStatBank/, State Statistical Office of the Republic of Macedonia http://www.stat.gov.mk/OtvoreniPodatociApi_en.aspx, Basque Institute of Statistics http://en.eustat.eus/bancopx/english/indice.html
Note also the grant proposal https://meta.wikimedia.org/wiki/Grants:IdeaLab/Import_and_visualize_census_data .
John Erling Blad /jeblad