You will be given a definition of a task first, then some input of the task.
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.

Passage: Between 2001 and 2011 shares in Tottenham Hotspur F.C. were listed on the Alternative Investment Market (AIM index). The majority shareholder, ENIC International Ltd, is an investment company established by the British billionaire Joe Lewis (British businessman). Daniel Levy (businessman), Lewiss partner at ENIC, is Executive Chairman of the club. They had acquired 29.9% after buying 27% share of the club for 22 million from Sugar in 1991. Shareholding by ENIC increased over the decade through the purchase of the remaining 12% holding of Alan Sugar in 2007 for 25m, and the 9.9% stake belonging to Stelios Haji-Ioannou through Hodram Inc in 2009. On 21 August 2009 the club reported that they had issued a further 30 million shares to fund the initial development costs of the new stadium project, and that 27.8 million of these new shares had been purchased by ENIC. The Annual Report for 2010 indicated that ENIC had acquired 76% of all Ordinary Shares and also held 97% of all convertible redeemable preference shares, equivalent to a holding of 85% of share capital. Following an announcement at the 2011 AGM, in January 2012 the club confirmed that they had been transferred into the private ownership of ENIC.
Output:
How many years were shares of Tottenham Hotspur F.C. listed on the Alternative Investment Market?