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 | Value | Change, % |
|---|---|---|
| 2012 | 33.8 | 4.58% |
| 2011 | 32.3 | 51.98% |
| 2010 | 21.2 | -17.48% |
| 2009 | 25.7 | 25.56% |
| 2008 | 20.5 | |
| 2007 | 0.0 | |
| 2006 | 0.0 | |
| 2005 | 0.0 | -100.00% |
| 2004 | 13.1 | |
| 2003 | 0.0 | |
| 2002 | 0.0 | |
| 2001 | 0.0 |
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