Is there a year when the US penny was not coined?

Sofia del C. writes: Is there a year when the US penny was not coined, during the 1900’s?

The U.S. cent has been struck every year since 1793 with only one exception. An acute shortage of copper, due to the turmoil of the war of 1812, precluded making one cent coins in 1815. In the 20th century not all Mints are represented but there is a cent for every year.