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 | 166.6 | 0.18% |
| 2011 | 166.3 | 2.72% |
| 2010 | 161.9 | -2.00% |
| 2009 | 165.2 | 0.49% |
| 2008 | 164.4 | -2.14% |
| 2007 | 168.0 | -0.77% |
| 2006 | 169.3 | 0.95% |
| 2005 | 167.7 | -36.19% |
| 2004 | 262.8 | -4.19% |
| 2003 | 274.3 | 66.04% |
| 2002 | 165.2 | -30.88% |
| 2001 | 239.0 |
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