Control of corruption during each prime minister's tenure

Every prime minister since 1991, ranked by how the control of corruption changed from their first day in office. Politare shows what happened during a tenure; it does not claim the office-holder caused it.

#	Prime minister	In office	Total	Per year	Chart
1	Stephen Harper	6 Feb 2006 – 4 Nov 2015	−1.0 points 2005 → 2015	−0.1 points/yr
2	Justin Trudeau	4 Nov 2015 – 14 Mar 2025	−4.7 points 2015 → 2024	−0.5 points/yr

Sorted by total, highest first. Every row is indexed to the last count complete before the first day in office ("from" marks a start that had to move because that count had no data, or because the period cut it); Levels are per cent changes, rates are differences in points; "per year" compounds levels and divides rates. Tenures with under 12 months, or under three observations, are left out. points, 0 to 100, higher is better · World Bank, Worldwide Governance Indicators (GOV_WGI_CC.SC): perceptions of public power used for private gain, petty and grand, a score from 0 to 100 with its 90 % interval · Canada data · as of Sep 2026.