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 | 55.0 | 57.81% |
| 2011 | 34.8 | 8.14% |
| 2010 | 32.2 | 4.89% |
| 2009 | 30.7 | 24.29% |
| 2008 | 24.7 | 26.67% |
| 2007 | 19.5 | -39.44% |
| 2006 | 32.2 | 62.63% |
| 2005 | 19.8 | -1.00% |
| 2004 | 20.0 | 18.34% |
| 2003 | 16.9 | 6.96% |
| 2002 | 15.8 | 2.60% |
| 2001 | 15.4 |
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