=https://www.peoplespunditdaily.com/policy/2018/06/22/whats-the-best-way-to-boost-tax-compliance-lower-tax-rates-or-oppressive-enforcement/
The Institut Economique Molinari in Belgium took a look at the same issue, but included data for all European Union nations. « Economic reasoning and international experience point invariably to common causes that consistently create obstacles to dealings in the official economy: prohibitions, compulsory levies and specific tax measures, as well as fastidious and complex regulations. »
