Year Healthy Slightly Moderately Strongly Died
damaged
By defoliation
1990 38.4 34.1 22.6 3.1 1.8
1995 33.0 39.7 21.5 2.9 2.9
1996 35.8 39.2 19.4 2.9 2.8
1997 38.0 37.9 18.6 2.9 2.6
1998 38.1 39.5 17.6 2.6 2.2
1999 41.3 40.5 13.8 2.2 2.2
2000 34.3 41.4 18.9 3.0 2.4
2001 33.9 41.8 18.9 3.0 2.4
2002 34.3 40.6 19.5 3.1 2.5
2003 31.5 42.0 20.3 3.6 2.6
2004 34.8 39.0 19.6 3.8 2.8
2005 33.2 39.6 20.0 4.1 3.1
2006 36.8 40.5 16.9 2.9 2.9
2007 51.8 27.5 12.5 5.9 2.3
2008 60.7 23.2 10.8 2.5 2.8
2009 54.8 26.8 12.4 3.3 2.6
2010 49.3 28.9 14.7 4.4 2.7
2011 62.3 18.9 13.7 2.1 2.9
2012 59.5 18.4 15.4 2.5 4.1
2013 55.6 22.0 16.5 3.0 2.8
2014 52.3 23.5 18.2 3.0 3.0
2015 50.5 25.5 16.2 5.3 2.6
2016 33.8 31.6 26.3 5.8 2.5
2017 29.9 29.1 30.9 8.0 2.1
2018 26.5 26.2 36.5 8.8 2.0
2019 31.6 33.3 26.3 7.1 1.7
2020 27.3 36.0 29.2 5.3 2.2
2021
22.8a
 29.6 37.0 8.8
1.8b
By discoloration of the foliage
1990 59.3 25.9 12.1 0.9 1.8
1995 85.1 10.3 1.6 0.1 2.9
1996 89.8 6.4 1.0 0.1 2.8
1997 92.2 4.3 0.8 0.1 2.6
1998 92.1 4.8 0.8 0.1 2.2
1999 93.2 3.7 0.8 0.1 2.2
2000 91.4 5.3 0.8 0.1 2.4
2001 93.7 3.4 0.5 – 2.4
2002 91.6 5.4 0.5 – 2.5
2003 91.0 5.8 0.6 – 2.6
2004 93.7 3.2 0.3 – 2.8
2005 92.8 3.6 0.5 – 3.1
2006 92.9 3.5 0.6 0.1 2.9
2007 94.0 2.0 1.1 0.6 2.3
2008 96.0 0.4 0.7 0.2 2.8
2009 95.7 1.3 0.4 0.0 2.6
2010 94.8 2.0 0.4 0.1 2.7
2011 94.7 1.4 0.7 0.3 2.9
2012 95.2 0.8 0.7 0.2 3.1
2013 94.5 1.9 0.5 0.3 2.8
2014 97.6 1.2 0.4 0.1 0.6
2015 88.8 7.7 1.0 0.1 2.6
2016 90.7 6.3 0.5 – 2.5
2017 88.0 7.4 2.7 0.1 1.8
2018 85.8 9.9 2.0 0.3 2.0
2019 89.4 7.9 – 1.0 1.7
2020 91.9 5.3 0.6 – 2.2
2021 94.3 3.8 0.0 0.2 1.7

Footnotes

*From 2007 the data are not comparable with that of the previous years, because the limits of the damage categories changed. The reason for that is the change to the international methodology (ICP Forests) including new damage categories. Source: National Land Centre Forestry Department, Forest Protection Measuring and Monitoring System.
aData corrections were made on 2 September 2022. Reason for the error: unplanned revision. The incorrect data were 22.9%.
bData corrections were made on 2 September 2022. Reason for the error: unplanned revision. The incorrect data were 1.7%.
Source: National Land Centre Forestry Department, Forest Protection Measuring and Monitoring System

Explanation of symbols

–
Non-occurrence.
__, |
Break in series (limited comparability).
0
Less than half of unit.
green number
Revised datum.
.