Year Number of strikes Number of workers involved Working hours not worked, thousands
1991 3 24,148 76.0
1992 4 1,010 33.0
1993 5 2,574 42.0
1994 4 31,529 229.0
1995a 7 172,048 1,708.0
1996 8 4,491 19.0
1997 5 853 15.0
1998 7 1,447 3.0
1999 5 16,685 242.0
2000 5 26,978 1,192.0
2001 6 21,128 61.0
2002 4 4,573 9.0
2003 7 10,831 19.0
2004 8 6,276 116.0
2005 11 1,425 7.0
2006 16 24,665 52.0
2007 13 64,612 186.0
2008 8 8,633 ..
2009 9 3,134 8.6
2010 7 3,263 133.1
2011 1
2012 3 1,885 4.6
2013 1
2014
2015 2
2016b 7 39,101 270.5
2017 5 6,706 30.4
2018b 6 15,535 289.4
2019b 12 20,905 416.3
2020 2

Footnotes

*
Source: Strikes statistics.
a
Estimated data with pedagogue strikes.
b
The data include professional estimates too.
.