Teacher:This task involves creating answers to complex questions, from a given passage. Answering these questions, typically involve understanding multiple sentences. Make sure that your answer has the same type as the "answer type" mentioned in input. The provided "answer type" can be of any of the following types: "span", "date", "number". A "span" answer is a continuous phrase taken directly from the passage or question. You can directly copy-paste the text from the passage or the question for span type answers. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words. A "number" type answer can include a digit specifying an actual value. For "date" type answers, use DD MM YYYY format e.g. 11 Jan 1992. If full date is not available in the passage you can write partial date such as 1992 or Jan 1992. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words.
Teacher: Now, understand the problem? Solve this instance: Passage: Upon launch, Gentoo quickly became a popular distribution, with 326 hits per day on average in 2002 on DistroWatch the third highest. However, over the years Gentoo has suffered from a dropping popularity. In 2003, Gentoo was the fourth most popular and dropped to seventh in 2004, ninth in 2005, tenth in 2006 and thirteenth in 2007. For 2008, Gentoo dropped to 18th, but the following year it ended its dropping streak by rising to 17th. Gentoo was placed 18th in 2010, 20th in 2011, 22nd in 2012, 33rd in 2013, 38th in 2014, and 45th in 2015. In 2016 it became slightly more popular, climbing back up to 35th place, but has since fallen to 41st (averaged out over the last three months).
Question: How many years after 2004 did it take for Gentoo to drop to position 45?
Answer type: Number
Student:
11.