If you compare crashes per flight by year, the entire industry has become safer over time. The expected number of crashes given their operating history assuming an average airline would likely be zero. In fact over 20 major airlines currently having a clean record. So, on it’s own that’s really not enough information to say anything.

If we are trying to find ‘the best’ airline in the industry you need to either consider only current practices/equipment etc, or look for airlines with zero crashes despite higher expected lifetime risks.