National Pizza Day is observed every year on February 9.
In honor of the day , here are some fun facts about the pie:
The average American eats about 46 pizza slices a year.
93 percent of Americans have eaten pizza in the last month.
The top five pizza sales days are: Super Bowl Sunday, New Year's Eve, Halloween, the night before Thanksgiving, and New Year's Day.
Regular thin crust is most popular in America
62 percent of Americans prefer meat toppings while 38 percent prefer vegetables.
The most popular pizza topping is pepperoni (36 percent).
Women are twice as likely as men to order vegetables on their pizza.
Pizza deliverers claim women are better tippers.
Saturday night is the most popular night to eat pizza.
36 percent of people consider pizza the perfect breakfast.
Below, it's pizza night aboard the international Space Station!