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Popularity is position on a rank-ordered list of the number of copies of a works cataloged during a given period. If multiple works have the same number of copies during that period they share a popularity number.
Overall popularity: 156,590
Popularity year-by-year (top 100,000)
| | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 |
| Popularity | | | | | | | | 22,326 | 31,234 |
Popularity quarter-by-quarter (top 50,000)
| | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 |
| Q1 | | | | | | | | | 24,126 |
| Q2 | | | | | | | | 7,308 | |
| Q3 | | | | | | | | | |
| Q4 | | | | | | | | | |
Popularity month-by-month (top 10,000)
| | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 |
| January | | | | | | | | | |
| February | | | | | | | | | |
| March | | | | | | | | | |
| April | | | | | | | | 5,114 | |
| May | | | | | | | | 5,279 | |
| June | | | | | | | | | |
| July | | | | | | | | | |
| August | | | | | | | | | |
| September | | | | | | | | | |
| October | | | | | | | | | |
| November | | | | | | | | | |
| December | | | | | | | | | |