表中の●をクリックすると、調査結果をご覧いただけます
| year | month | ||||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 月変化 | |
| 2025 | ● | ● | ● | ● | ● | ● | |||||||
| 2024 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | |||
| 2023 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ||
| 2022 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | |||
| 2021 | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 | |||
| 2020 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 | |
| 2019 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 |
| 2018 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 | |
| 2017 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 |
| 2016 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 |
| 2015 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 |
| 2014 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 | |
| 2013 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 | |
| 2012 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 | ||
| 2011 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 | |
| 2010 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 |
| 2009 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 |
| 2008 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 |
| 2007 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 |
| 2006 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 |
| 2005 | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | C線 | ||
| 2004 | ● | ● | ● | ● | ● ● |
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| 2003 | ● ● ● |
● | ● ● ● |
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