The art of pasta making and the devotion to the food as a whole has evolved since pasta was first conceptualized. In 2008, it was estimated that Italians ate over of pasta per person, per year, easily beating Americans, who ate about per person. Pasta is so beloved in Italy that individual consumption exceeds the average production of wheat of the country; thus, Italy frequently imports wheat for pasta making. In contemporary society, pasta is ubiquitous and there is a variety of types in local supermarkets, in many countries. With the worldwide demand for this staple food, pasta is now largely mass-produced in factories and only a tiny proportion is crafted by hand. Ingredients Since at least the time of Cato's , basic pasta dough has been made mostly of wheat flour or semolina, with durum wheat used predominantly in the South of Italy and soft wheat in the North. Regionally other grains have been used, including those from barley, buckwheat, rye, rice, and maize, as well as chestnut and chickpea flours. To address the needs of people affected by gluten-related disorders (such as coeliac disease, non-celiac gluten sensitivity and wheat allergy sufferers), some recipes use rice or maize for making pasta. Grain flours may also be supplemented with cooked potatoes. Other additions to the basic flour-liquid mixture may include vegetable purees such as spinach or tomato, mushrooms, cheeses, herbs, spices and other seasonings. While pastas are, most typically, made from unleavened doughs, the use of yeast-raised doughs are also known for at least nine different pasta forms. Additives in dried, commercially sold pasta include vitamins and minerals that are lost from the durum wheat endosperm during milling. They are added back to the semolina flour once it is ground, creating enriched flour. Micronutrients added may include niacin (vitamin B3), riboflavin (vitamin B2), folate, thiamine (vitamin B1), and ferrous iron. Varieties Fresh Fresh pasta is usually locally made with fresh ingredients unless it is destined to be shipped, in which case consideration is given to the spoilage rates of the desired ingredients such as eggs or herbs. Furthermore, fresh pasta is usually made with a mixture of eggs and all-purpose flour or "00" low-gluten flour. Since it contains eggs, it is more tender compared to dried pasta and only takes about half the time to cook. Delicate sauces are preferred for fresh pasta in order to let the pasta take