| Peaks/year |
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| 0 peak | years | 2009 | 2011 | 2013 |
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| 01 | years | 2003 | 2004 | 2006 | 2012 | 2014 | 2018 |
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| Peak months | 7 | 8 | 7 | 7 | 8 | 7 |
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| 02 | years | 2001 | 2002 | 2005 | 2008 | 2010 | 2013 | 2015 | 2016 | 2017 |
| Peak months | 7, 8 | 8, 9 | 7, 8, | 6, 7 | 7, 8 | 7, 8 | 7, 11 | 7, 8 | 7, 8 | |
| 03 | years | 1998 | 1999 | 2000 |
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| Peak months | 6, 7, 8 | 6, 7, 8 | 7, 8, 9 |
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