┊ dashed lines mark 2001 Dot-com bust & 9/11 · 2008 Global financial crisis · 2020 COVID-19 pandemic
Method & caveats. Gallup's annual June Confidence in Institutions poll (telephone, ~1,000 adults): "Please tell me how much confidence you, yourself, have in each one — a great deal, quite a lot, some, or very little?" Value is great deal + quite a lot. Asked every year since 1993 and irregularly before; where Gallup polled twice in one year (1991) the later poll is kept.
Sources
Every value on this page is read from the publisher below. Current and historical source documents: