The 22 Hornet was a non catalog item as a 1A in 1987-89
In 1990-91 it was an un cataloged 1B. It came back in 1993 still un cataloged but with a note in the 93 price list "special production"
1994-96 its a cataloged 1B that is where Claytons book ends.
Ruger doesn't share production numbers but sales/demand must have been high enough to make it a catalog item.