Which U.S. music chart did Ernie's 'Rubber Duckie' reach in 1970?

Ernie’s “Rubber Duckie” reached the Billboard Hot 100 in 1970.

Written by Jeff Moss and arranged by Joe Raposo, the song was performed by Jim Henson as Ernie on Sesame Street. It celebrates Ernie’s favorite bath toy and became one of the program’s most recognizable songs.

The song first appeared in a Sesame Street episode broadcast on February 25, 1970. Its popularity extended well beyond children’s television, leading Columbia Records to release it as a 45 rpm single. On September 26, 1970, it peaked at No. 16 on the Billboard Hot 100.

That chart placement is often mixed up with the song’s international results: it reached No. 10 in Australia and No. 11 on the New Zealand Listener Charts. Adult Contemporary and Hot Country Songs are separate chart categories, while Cash Box Top 100 was a competing chart rather than the Billboard chart named in the question.