TASK DEFINITION: This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning). 
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.
PROBLEM: Passage: After the political changes, in 1991, Bulgaria had a US$11.25 billion state debt, which represented 180% of the GDP. The state debt peaked in 1994, when it reached US$14.4 billion. During 1998-2008 Bulgaria maintained policy of Government budget balance, which reduced the state debt to 5.07 billion euro. Combined with the economic growth in that period, the state debt dropped to a record low of 13.7% of GDP, one of the lowest in the European Union. In 2008 Bulgaria also maintained 4.286 billion euro fiscal reserve, meaning that net state debt at this moment was only 0.784 billion euro. After the Financial crisis of 2007–08 Bulgaria turned to policy of Deficit spending and at the end of 2013 the state debt rose up to 7.219 billion euro, representing 18.1% of the GDP. In 2015, the debt rate increased further to 26.7% of the GDP, still remaining the third lowest in EU after Estonia and Luxembourg. Part of the increase was driven by the collapse of Corporate Commercial Bank in 2014, the fourth largest bank in the country, and the subsequent paying out of Deposit insurance.

SOLUTION: For how many years did Bulgaria maintain a policy of a balanced budget?

PROBLEM: Passage: As of 2011 the 88,112 residents of Orem had a racial and ethnic composition of 89.3% White American, 0.9% black or African American, 0.9% Native Americans of the United States, 1.6% Asian American, 0.5% Pacific Islanders, 4% non-Hispanics reporting some other race, 2.9% two or more races reported and 14.8% Hispanic, as Orem has a large Mexican American community with other Latinos residing in the city. This contrasts with the census of 2000, which showed a racial makeup of 90.80% White (U.S. Census), 0.33% African American (U.S. Census), 0.73% Native American (U.S. Census), 1.45% Asian (U.S. Census), 0.86% Pacific Islander (U.S. Census), 3.64% from Race (United States Census), and 2.18% from two or more races. Hispanic (U.S. Census) or Latino (U.S. Census) of any race were 8.56% of the population. The 2000 Census counted 84,324 people, 23,382 households, and 19,079 families. The population density at that time was 4,572.6 people per square mile (1,765.6/km²). There were 24,166 housing units at an average density of 1,310.4 per square mile (506.0/km²). There were 23,382 households out of which 48.8% had children under the age of 18 living with them, 69.0% were Marriage living together, 9.5% had a female householder with no husband present, and 18.4% were non-families. 12.4% of all households were made up of individuals and 5.1% had someone living alone who was 65 years of age or older. The average household size was 3.57 and the average family size was 3.93.

SOLUTION: How many fewer people, in terms of percentage, belonged to the biggest racial group in 2011 compared to 2000?

PROBLEM: Passage: By 9 September 1922, the Turkish army had entered Smyrna, with the Greek authorities having left two days before. Large scale disorder followed, with the Christian population suffering under attacks from soldiers and Turkish inhabitants. The Greek archbishop Chrysostomos had been lynched by a mob which included Turkish soldiers, and on September 13, a fire from the Armenian quarter of the city had engulfed the Christian waterfront of the city, leaving the city devastated. The responsibility for the fire is a controversial issue; some sources blame Turks, and some sources blame Greeks or Armenians. Some 50,000 to 100,000 Greeks and Armenians were killed in the fire and accompanying massacres. According to the population exchange treaty signed by both the Turkish and Greek governments, Greek orthodox citizens of Turkey and Turkish and Greek Muslim citizens residing in Greece were subjected to the population exchange between these two countries. Approximately 1,500,000 Orthodox Christians, being ethnic Greeks and ethnic Turks from Turkey and about 500,000 Turks and Greek Muslims from Greece were uprooted from their homelands. M. Norman Naimark claimed that this treaty was the last part of an ethnic cleansing campaign to create an ethnically pure homeland for the Turks Historian Dinah Shelton similarly wrote that "the Lausanne Treaty completed the forcible transfer of the country's Greeks." A large part of the Greek population was forced to leave their ancestral homelands of Ionia, Pontus and Eastern Thrace between 1914-22. These refugees, as well as Greek Americans with origins in Anatolia, were not allowed to return to their homelands after the signing of the Treaty of Lausanne.

SOLUTION:
Across how many years was the Greek population forced to leave their ancestral homelands?