Number of tiers
Bulgaria
Answer
2
Source
OSCE ODIHR report on 2009
http://www.osce.org/odihr/elections/38934?download=true
IPU: http://www.ipu.org/parline-e/reports/arc/2045_09.htm
Comment
In 2009 elections, there was one seat for each of the 31 regions elected on majoritarian principles, and 209 seats using List PR.
