I would guess yours to be a 1997 year of shipping.
From the Ruger website:
243-44458 1996 245-74954 1997
The above chart shows the approximate first serial number shipped for the indicated year. This number should be used as a point of reference only. It is not necessarily the very first serial number shipped, but it can be used to determine the approximate year your RugerŪ firearm was shipped. Ruger does not necessarily produce firearms in serial number order. There are occasions when blocks of serial numbers have been manufactured out of sequence, sometimes years later. Also, within a model family the same serial number prefix may be used to produce a variety of different models, all in the same block of serial numbers. In some cases, firearms may be stored for a length of time before they are shipped. For Letters of Authenticity, please download and mail in the Request for Letter of Authenticity form. The Letter of Authenticity lists the serial number, ship date, model and caliber. We are unable to provide any information beyond that." https://ruger.com/pdf/letterOfAuthenticity.pdf