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 | 36.1 | 0.00% |
| 2011 | 36.1 | -3.63% |
| 2010 | 37.5 | 7.76% |
| 2009 | 34.8 | 5.78% |
| 2008 | 32.9 | 4.11% |
| 2007 | 31.6 | 6.40% |
| 2006 | 29.7 | 7.61% |
| 2005 | 27.6 | 6.56% |
| 2004 | 25.9 | 8.37% |
| 2003 | 23.9 | 4.37% |
| 2002 | 22.9 | 4.09% |
| 2001 | 22.0 |
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