The total number of full-time equivalent jobs was 130,988. The number of jobs in the primary sector was 13, of which 10 were in agriculture and 4 were in forestry or lumber production. The number of jobs in the secondary sector was 33,171 of which 24,848 or (74.9%) were in manufacturing, 10 were in mining and 7,313 (22.0%) were in construction. The number of jobs in the tertiary sector was 97,804. In the tertiary sector; 12,880 or 13.2% were in wholesale or retail sales or the repair of motor vehicles, 11,959 or 12.2% were in the movement and storage of goods, 6,120 or 6.3% were in a hotel or restaurant, 4,186 or 4.3% were in the information industry, 10,752 or 11.0% were the insurance or financial industry, 13,695 or 14.0% were technical professionals or scientists, 6,983 or 7.1% were in education and 16,060 or 16.4% were in health care.

Which were there more jobs of in the primary sector, forestry and lumber production or agriculture?
A: agriculture

By 1474, cannons had been introduced in Mdina. Other extensive preparations for an attack were made in the 1480s, when the fortifications were once again improved under the direction of Sicilian military engineers. At this point, some buildings in Rabat were demolished to clear the fortifications' line of fire. By 1522, the fortifications were being modernized with the construction of embrasures. However, the walls were still regarded as obsolete, since they lacked bastions and could not resist bombardment from modern artillery. Most of the medieval walls of Mdina were gradually dismantled between the 1530s and 1720s, when the city's fortifications were being upgraded by the Hospitallers. One of the most significant visible remnants of the medieval fortifications is the Greeks Gate and the surrounding curtain walls, which still retains its medieval form apart from the outer portal which was built in the 18th century. Parts of the double walls, including the remains of two gun loops, still stand between the gate and the Torre dello Standardo. Most of the northern and eastern walls date back to the medieval period, although some sections were rebuilt by the Hospitallers. The northern ramparts contain a medieval wall tower, while the remains of Byzantine antemurals and the foundations of a late 15th-century artillery platform have been found in the eastern walls.

What city has remnants of some sections of wall that were rebuilt by the Hospitallers during their fortification?
A: Mdina

The U.S. public debt was $909 billion in 1980, an amount equal to 33% of Americas gross domestic product (GDP); by 1990, that number had more than tripled to $3.2 trillionor 56% of GDP. In 2001 the national debt was $5.7 trillion; however, the debt-to-GDP ratio remained at 1990 levels. Debt levels rose quickly in the following decade, and on January 28, 2010, the U.S. debt ceiling was raised to $14.3 trillion. Based on the 2010 United States federal budget, total national debt will grow to nearly 100% of GDP, versus a level of approximately 80% in early 2009. The White House estimates that the governments tab for servicing the debt will exceed $700 billion a year in 2019, up from $202 billion in 2009.

How many years did it take for the national debt to increase from $909 billion in 1980 to $5.7 trillion?
A:
21