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 | 24.1 | 6.87% |
| 2011 | 22.6 | 2.55% |
| 2010 | 22.0 | 23.60% |
| 2009 | 17.8 | -13.59% |
| 2008 | 20.6 | 19.77% |
| 2007 | 17.2 | 40.98% |
| 2006 | 12.2 | 22.00% |
| 2005 | 10.0 | -8.26% |
| 2004 | 10.9 | 84.75% |
| 2003 | 5.9 | -50.83% |
| 2002 | 12.0 | 76.47% |
| 2001 | 6.8 |
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