Well, the number could have been wrong last year, or incorrect this year. You should contact the HOA for the numbers.
However, there are a lot of investors buying property - so there might have been a few investors in that complex. As well as homeowners keeping their condos and renting them out and moving up to a larger home.
It's not good or bad, it's just shows at this time there are more renters there. We hope the HOA will continue to maintain the complex and make it a great place to live.