UH, maybe because my son was born in '78? Hep B vaccines, although apparently "available" were not widely used "back then". Since you quote the article, maybe you ought to go back and read it.
The site states that in "In 1991, the ACIP recommended a comprehensive hepatitis B vaccination strategy to eliminate HBV transmission in the United States." This apparently targeted newborns and primary school age children. "In 1994, the ACIP expanded the recommendations to include previously unvaccinated children aged 11-12 years " - Since my son was nearing graduation from high school then, he didn't fall into the guidelines - IF he was even seeing a pediatrician at the time, which he wasn't.
Better to check out the situation before posting baiting comments.