Domino's Brooklyn-style pizza. (AP Photo/Lisa Tolin)

(KYTX) –  National Pizza Day is observed annually on February 9th.  Whether it is thin crust, Chicago style, deep dish or anything in between, pizza is an American favorite.

Here are some interesting facts about pizza:

• Pepperoni is the most popular pizza at 36% of all pies ordered.
• Over 3 billion pizzas are sold in the USA each year.  Add another 1 billion on frozen pizzas
• 17% of all US Restaurants are pizzerias.
•  Antica Pizzeria, the first Pizzeria, opened in Naples, Italy, in 1738.
•  Gennaro Lombardi, the first Pizzeria in the United States, opened in 1895 in New York City.
• Americans consume on average 23 pounds of pizza per person each year.