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 | 94.7 | 2.61% |
| 2011 | 92.3 | 4.13% |
| 2010 | 88.6 | 51.71% |
| 2009 | 58.4 | 139.34% |
| 2008 | 24.4 | 23.23% |
| 2007 | 19.8 | -7.04% |
| 2006 | 21.3 | 14.52% |
| 2005 | 18.6 | -2.11% |
| 2004 | 19.0 | -5.47% |
| 2003 | 20.1 | -7.80% |
| 2002 | 21.8 | 27.49% |
| 2001 | 17.1 |
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