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 | 15.3 | -3.71% |
| 2011 | 15.9 | -0.50% |
| 2010 | 16.0 | 0.31% |
| 2009 | 16.0 | -0.31% |
| 2008 | 16.0 | -0.62% |
| 2007 | 16.1 | 14.18% |
| 2006 | 14.1 | -2.08% |
| 2005 | 14.4 | -7.10% |
| 2004 | 15.5 | 1.97% |
| 2003 | 15.2 | -3.80% |
| 2002 | 15.8 | 1.28% |
| 2001 | 15.6 |
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