mid-fifth century and still a quarter of a million at the end of the century. Novel 36 of Emperor Valentinian III records 3.629 million pounds of pork to be distributed to the needy at 5 lbs. per month for the five winter months, sufficient for 145,000 recipients. This has been used to suggest a population of just under 500,000. Supplies of grain remained steady until the seizure of the remaining provinces of North Africa in 439 by the Vandals, and may have continued to some degree afterwards for a while. The city's population declined to less than 50,000 people in the Early Middle Ages from 700 AD onward. It continued to stagnate or shrink until the Renaissance. When the Kingdom of Italy annexed Rome in 1870, the city had a population of about 225,000. Less than half the city within the walls was built up in 1881 when the population recorded was 275,000. This increased to 600,000 by the eve of World War I. The Fascist regime of Mussolini tried to block an excessive demographic rise of the city but failed to prevent it from reaching one million people by the early 1930s. Population growth continued after the Second World War, helped by a post-war economic boom. A construction boom also created many suburbs during the 1950s and 1960s. In mid-2010, there were 2,754,440 residents in the city proper, while some 4.2 million people lived in the greater Rome area (which can be approximately identified with its administrative metropolitan city, with a population density of about 800 inhabitants/km2 stretching over more than ). Minors (children ages 18 and younger) totalled 17.00% of the population compared to pensioners who number 20.76%. This compares with the Italian average of 18.06% (minors) and 19.94% (pensioners). The average age of a Roman resident is 43 compared to the Italian average of 42. In the five years between 2002 and 2007, the population of Rome grew by 6.54%, while Italy as a whole grew by 3.56%. The current birth rate of Rome is 9.10 births per 1,000 inhabitants compared to the Italian average of 9.45 births. The urban area of Rome extends beyond the administrative city limits with a population of around 3.9 million. Between 3.2 and 4.2 million people live in the Rome metropolitan area. Ethnic groups According to the latest statistics conducted by ISTAT, approximately 9.5% of the population consists of non-Italians. About