SDG Indicators – Tiers as of 11 Dec 2019
As of 11 December 2019: The updated tier classification contains 116 Tier I indicators, 92 Tier II indicators and 20 Tier III indicators. Source: “SDG Indicators – Tiers.” Accessed December 16, 2019. https://unstats.un.org/sdgs/iaeg-sdgs/tier-classification/.