Thanks to Lisa Jarvis at C&E News, here's a chart (PDF) of the 39 drugs approved last year by the FDA. Last year was a good year, by almost any measure. The question as we go on will be whether this was a one-time spike, or the start of a long-awaited turnaround. If the latter, I think it will be as much of a regulatory phenomenon as a scientific one (faster reviews, etc.)There has been concern over declining approvals for new drugs, at least for 2012, this trend was not confirmed: "Last year, the Food & Drug Administration approved 39 new products, a 16-year high."
A quick google revealed this article with approval numbers for the years past.