When did newborns begin receiving hep b vaccine at birth?

https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5730a3.htm

“The recommended timing of administration of the first dose of hepatitis B vaccine to infants has evolved since then to optimize prevention of perinatal and early childhood HBV infections. In 1991, the first dose was recommended to be administered at birth before hospital discharge or at age 1-2 months.”