Bicameral: Upper chamber (House of Lords), Data valid as of 1 Jan of given year; 2021 population figures (revised as of July 2022) used from the United Nations Population Division - World Population Prospects database to calculate ratios; Ratios can be interpreted as follows:  
-	0 means no representation at all of ‘youth’ (45 years and below) in parliament 
-	1 means perfectly proportional representation of ‘youth’ (45 years and below) in parliament 
-	<1 means under-representation of ‘youth’ (45 years and below) in parliament 
-	>1 means over-representation of ‘youth’ (45 years and below) in parliament 