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 | 93.6 | -3.15% |
| 2011 | 96.6 | 2.67% |
| 2010 | 94.1 | 18.07% |
| 2009 | 79.7 | 105.94% |
| 2008 | 38.7 | 64.68% |
| 2007 | 23.5 | 56.67% |
| 2006 | 15.0 | 0.00% |
| 2005 | 15.0 | 18.11% |
| 2004 | 12.7 | 1.60% |
| 2003 | 12.5 | 145.10% |
| 2002 | 5.1 | 6.25% |
| 2001 | 4.8 |
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