Write a question about the following article: 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).
How many positions did Gentoo drop between 2004 and 2007?