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 | 28.1 | 59.19% |
| 2011 | 17.6 | -28.66% |
| 2010 | 24.7 | 12.27% |
| 2009 | 22.0 | 15.18% |
| 2008 | 19.1 | 6.11% |
| 2007 | 18.0 | 14.65% |
| 2006 | 15.7 | 21.71% |
| 2005 | 12.9 | -0.77% |
| 2004 | 13.0 | 44.44% |
| 2003 | 9.0 | 18.42% |
| 2002 | 7.6 | -34.48% |
| 2001 | 11.6 |
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