The number of sit-down diners has plummeted in several countries as the restaurant world grinds to a halt.

In the United States alone, the average number of diners on Tuesday is down about 85 percent compared to the same day last year, according to booking site OpenTable. Of course, in many of the hardest hit areas, new rules were implemented allowing only deliveries and takeout at restaurants and bars.

Also, many restaurants and bars voluntarily closed due to various reasons, from employee health concerns to lack of customers.

OpenTable gathered data from the nearly 60,000 restaurants in its platform. Here's a look at some of its stats:

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