Ozone-depleting substances are any substance containing chlorine or bromine that destroys the stratospheric ozone layer. The stratospheric ozone absorbs most of the biologically damaging ultraviolet radiation.
| Date | Valeur | Modifier , % |
|---|---|---|
| 2013 | 29,1 | -31,19 % |
| 2012 | 42,4 | -12,90 % |
| 2011 | 48,6 | -1,98 % |
| 2010 | 49,6 | -9,32 % |
| 2009 | 54,7 | -5,36 % |
| 2008 | 57,8 | 19,18 % |
| 2007 | 48,5 | 14,12 % |
| 2006 | 42,5 | 26,87 % |
| 2005 | 33,5 | 24,54 % |
| 2004 | 26,9 | 4,67 % |
| 2003 | 25,7 | 6,20 % |
| 2002 | 24,2 |