Notes
For some parliaments, data can not be presented on an annual basis, for example because parliamentary sessions run from April to March of the following year. In such cases, the period to which the data corresponds is specified here.
Annual totals include both ordinary and organic laws, as well as legislative decrees.
Other than by parliament or the Executive, laws may be initiated by the Assemblies of the Autonomous Communities by a request to their Government to adopt or send a bill to the Congress Committee. They may send up to three delegates to the parliament to defend the said bill.
Laws (with the exception of specific organic laws, tax or international law) may also be initiated by the exercise of popular initiative with a minimum of 500,000 accredited signatures.