| Year | State reserves(Category Ib) ha | National parks (Category II ) ha | State preserves (Category IV) ha |
|---|---|---|---|
| 1990 | 71000 | 150000 | 81000 |
| 1995 | 71000 | 150000 | 81000 |
| 2000 | 71000 | 150000 | 82000 |
| 2001 | 71000 | 150000 | 82000 |
| 2002 | 41000 | 178000 | 82000 |
| 2003 | 41000 | 178000 | 82000 |
| 2004 | 41000 | 178000 | 94000 |
| 2005 | 41000 | 178000 | 94000 |
| 2006 | 42000 | 178000 | 94000 |
| 2007 | 35000 | 166000 | 90000 |
| 2008 | 35000 | 166000 | 90000 |
| 2009 | 35000 | 226000 | 112000 |
| 2010 | 35000 | 221000 | 104000 |
| 2011 | 35000 | 237000 | 96000 |
| 2012 | 35000 | 237000 | 96000 |
| 2013 | 35000 | 237000 | 112000 |
| 2014 | 35000 | 237000 | 112000 |
| 2015 | 35500 | 233600 | 114100 |
| 2016 | 35500 | 233500 | 114100 |
| 2017 | 35500 | 233500 | 114100 |