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 | 26.0 | -16.40% |
| 2002 | 31.1 | -61.37% |
| 2001 | 80.5 | 10.58% |
| 2000 | 72.8 | -18.29% |
| 1999 | 89.1 | 0.11% |
| 1998 | 89.0 | 8.80% |
| 1997 | 81.8 | 22.09% |
| 1996 | 67.0 | 11.48% |
| 1995 | 60.1 | 21.91% |
| 1994 | 49.3 | 160.85% |
| 1993 | 18.9 | -10.00% |
| 1992 | 21.0 |
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