The year wise production of a company (in tonnes) is given in the following table.
| Year | Production (in tonnes) |
| 2001-02 | 790 |
| 2002-03 | 810 |
| 2003-04 | 815 |
| 2004-05 | 890 |
| 2005-06 | 516 |
| 2006-07 | 902 |
| 2007-08 | 912 |
| 2008-09 | 922 |
From 2001 - 02 to 2008 - 09 generally the production was increased, with the exception of one year. The year was:
1
2005-06
2
2004-05
3
2002-03
4
2006-07