What is the fine-grained topic of the following text: The data, compiled by the Federal Board of Revenue with the help of the National Database and Registration Authority, shows, and predictably so, that Punjab is home to a majority of the suspected tax evaders followed by Sindh, Khyber Pakhtunkhwa, Balochistan, Azad Kashmir and Gilgit-Baltistan. Only return the topic.
Tax evasion in different regions of Pakistan