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, % |
|---|---|---|
| 2003 | 9.5 | -40.25% |
| 2002 | 15.9 | 0.00% |
| 2001 | 15.9 | -33.75% |
| 2000 | 24.0 | 0.00% |
| 1999 | 24.0 | -24.53% |
| 1998 | 31.8 | 0.00% |
| 1997 | 31.8 | 0.00% |
| 1996 | 31.8 | 0.00% |
| 1995 | 31.8 | -28.38% |
| 1994 | 44.4 | -3.90% |
| 1993 | 46.2 | 45.28% |
| 1991 | 31.8 |
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