If the country publishes the election (voting) results online, what is the level of aggregation?

Slovenia

Answer

Results aggregated at polling station level
Results aggregated at constituency level
National results are published electoral district level

Source

http://www.dvk-rs.si/index.php/si/arhiv-drzavni-zbor-rs/leto-2014-predcasne-volitve
http://volitve.gov.si/dz2014/rezultati/rezultati_slo.html
http://volitve.gov.si/dz2014/rezultati/izidi_enote.html
http://volitve.gov.si/dz2014/rezultati/izidi_okraji.html