You can't use the inflation calculator for rent. The inflation calculator is an aggregate of all things, including the cost of all goods and services but also income. It is very much a "macro" indicator. For instance, the long-term costs of some goods and services have grown much faster than the aggregate inflation rate (most notably college tuition), while the long-term costs of other goods and services have actually stayed relatively flat over time or decreased compared to the average inflation rate (such as airfare, or today's gas prices are pretty similar to what they were 15 years ago, etc.).

You would really have to just delve into local rent statistics to see what has actually changed in terms of average rent.