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: Economic; The importance of trade and economic interests to the participants is often under estimated; contemporaries viewed Dutch and English support for the Habsburg cause as primarily driven by a desire for access to the Spanish American markets. Modern economics generally assumes a constantly growing market whereas the then dominant theory of Mercantilism viewed it as static. As a result, increasing your share of trade implied taking it from someone else, with the government's role being to restrict foreign competition. Trade was often used as a policy weapon; between 1690-1704, English import duties increased by 400%, while the 1651-1663 Navigation Acts were a major factor in the Anglo-Dutch Wars. On 6 September 1700, France banned the import of English manufactured goods like cloth and imposed prohibitive duties on a wide range of others. Military; the armies engaged in the Nine Years War often exceeded 100,000 men and proved too large for the pre-industrial economies of its participants. Those of 1701-1714 averaged around 35,000 - 50,000 but a dependence on water-borne transport accentuated the importance of rivers like the Rhine in Germany or the Adda in Northern Italy. Reliance on the local countryside for resupply limited operations in poor areas like Northern Spain; these factors confined campaigns to the same general areas.
answer:
How many years did the English import duties increase by 400%?


question:
Passage: After their ouster from the coastal ports of China, Japanese and Portuguese traders collaborated with illegal smugglers on island ports along the Zhejiang and Fujian coast. Among these ports, Shuangyu on Liuheng Island  off the coast of Ningbo emerged as the primary emporium of clandestine trade. At first, Shuangyu only had temporary mat-sheds for the smugglers to house themselves and their goods during the trading season. In 1539, Fujianese traders started to guide foreign traders from Patani and Malacca to barter in Shuangyu and started to occupy the island. They were soon joined by the Fujianese merchants Jinzi Lao  and Li Guangtou , who led the Portuguese and assorted adventurers to Shuangyu. Attracted by the growing trade on the Zhejiang coast, the Xu brothers' syndicate moved their base of operations from the Malay Peninsula to Shuangyu. The existing clout of the Xu syndicate and its close partnership with the Portuguese made it the foremost smuggling bloc by 1542 after a series of mergers among the merchant-pirates in Shuangyu. The Ming navy began to clamp down on smuggling activities in 1543, but the Xu syndicate was able to repulse the Ming attacks in Shuangyu with the aid of Portuguese firepower. Hardened by their victories against the Ming navy, the smugglers expanded their network of activities down the coast of China all the way to Guangdong and inland to the metropolis of Nanjing, with Shuangyu being their hub. In 1544, this network was further expanded when Wang Zhi joined the Xu syndicate, bringing along his Japanese connections to Shuangyu. Thus Shuangyu reached its zenith as the biggest entrepôt in maritime East Asia trading goods from Europe and Asia until its downfall in 1548.
answer:
After the Ming navy began trying to stop smuggling in 1543, how many years passed before the Xu syndicate downfall?


question:
Passage: An Italian Post Office opened on September 11, 1923 in Corfu, issuing a set of 8 Italian stamps overprinted "CORFU" which were placed on sale on the 20th. Three additional stamps overprinted in Greek currency arrived on 24th. The third stamp was 2.40 drachma on 1 lire. The Post Office closed at midday on 26 September 1923, only remaining open to dispatch the morning mail. The office had been open for 15 days. Three further values arrived on the day the Post Office closed, and were never issued. They eventually became available for sale at the postal ministry in Rome. Many used copies of these stamps have forged postmarks, but it is known that the Corfu cancel was applied to hundreds of stamps before the Post Office closed.
answer:

How many days after the Post Office opened in Corfu did three additional stamps in Greek currency arrive?