The debt of Bulgarian citizens towards banks and leasing institutions amounts to 10 billion levs.Credits have increased by 50%, "Industry Watch" reports.At the same time, however, the wealth of the Bulgarian citizen has increased by 23% for a year from June 2007 until now.According to economist Georgi Angelov real income 2-3 times above what is declared is being concealed in the construction and tourism sectors.The income from people working abroad is between 1,5 and 2 billion levs, Angelov added, cited by BNR (Bulgarian National Radio).