instruction:
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.
question:
Passage: Since 1999, the overall crime rate of Charleston has declined markedly. The total crime index rate for Charleston in 1999 was 597.1 crimes committed per 100,000 people, while in 2011, the total crime index rate was 236.4 per 100,000.
answer:
How many crimes committed per 100000 people lower was the rate in 2011 versus 1999?


question:
Passage: After the War of Independence and truce called in July 1921, representatives of the British government and the Irish treaty delegates, led by Arthur Griffith, Robert Barton and Michael Collins, negotiated the Anglo-Irish Treaty in London from 11 October to 6 December 1921. The Irish delegates set up headquarters at Hans Place in Knightsbridge, and it was here in private discussions that the decision was taken on 5 December to recommend the treaty to Dáil Éireann.The Second Dáil Éireann narrowly ratified the Treaty. In accordance with the treaty, on 6 December 1922 the entire island of Ireland became a self-governing Dominion called the Irish Free State . Under the Constitution of the Irish Free State, the Parliament of Northern Ireland had the option to leave the Irish Free State one month later and return to the United Kingdom. During the intervening period, the powers of the Parliament of the Irish Free State and Executive Council of the Irish Free State did not extend to Northern Ireland. Northern Ireland exercised its right under the treaty to leave the new Dominion and rejoined the United Kingdom on 8 December 1922. It did so by making an address to the King requesting, "that the powers of the Parliament and Government of the Irish Free State shall no longer extend to Northern Ireland." The Irish Free State was a constitutional monarchy sharing a monarch with the United Kingdom and other Dominions of the British Commonwealth. The country had a governor-general , a bicameral parliament, a cabinet called the "Executive Council", and a prime minister called the President of the Executive Council.
answer:
According to the treaty, how many years after negotiation would the entire island of Ireland become a self-governing Dominion known as the Irish Free State?


question:
Passage: The life expectancy at birth in Himachal Pradesh increased significantly from 52.6 years in the period from 1970-75 (above the national average of 49.7 years) to 72.0 years for the period 2011-15 (above the national average of 68.3 years). The infant mortality rate stood at 40 in 2010, and the crude birth rate has declined from 37.3 in 1971 to 16.9 in 2010, below the national average of 26.5 in 1998. The crude death rate was 6.9 in 2010. Himachal Pradeshs literacy rate has almost doubled between 1981 and 2011 (see table to right). The state is one of the List of Indian states and union territories by literacy rate with a literacy rate of 83.78% as of 2011.
answer:

How many more years has the life expectancy at birth increased from 52.6 to 72.0?