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Table 3 Numbers of articles and paragraphs over the time periods

From: Newspaper coverage before and after the HPV vaccination crisis began in Japan: a text mining analysis

Time period Number of paragraphs Number of articles
2009.7–9 32 6
 10–12 108 11
2010.1–3 244 28
 4–6 607 91
 7–9 567 93
 10–12 764 115
2011.1–3 374 89
 4–6 68 8
 7–9 39 7
 10–12 25 10
2012.1–3 13 4
 4–6 52 11
 7–9 139 14
 10–12 15 4
2013.1–3 66 11
 4–6 644 83
 7–9 398 44
 10–12 280 50
2014.1–3 236 31
 4–6 121 18
 7–9 298 32
 10–12 131 23
2015.1–3 193 26
 4–6 241 29
 7–9 486 69
 10–12 442 81
2016.1–3 207 24
 4–6 178 30
 7–9 569 59
 10–12 248 38
2017.1–3 145 16
 4–6 118 15
 7–9 43 8
Total 8091 1178