The report that 4,000 restaurants have closed across the country in the past year made us wonder how New York is doing, so we crunched some numbers with MenuPages. Since the beginning of the year, 395 restaurants out of 6,600 listings have closed, or about 6 percent. During the same period a year ago, only 4.6 percent of the restaurants in the database had closed. (Now that MenuPages covers Brooklyn, there are listings for 8,633 restaurants.) Considering all the closings we’ve covered this year, the slump doesn’t sound that dire, especially since new spots open every day. Some older restaurants even told Crain’s that business is up. Did somebody say “Downturnaround”?