| Year | State reserves(Category Ib) ha | National parks (Category II ) ha | State preserves (Category IV) ha | State reserves(Category Ib) | National parks (Category II ) | State preserves (Category IV) |
|---|---|---|---|---|---|---|
| 1990 | 71000 | 150000 | 81000 | 23.51 | 49.67 | 26.82 |
| 1995 | 71000 | 150000 | 81000 | 23.51 | 49.67 | 26.82 |
| 2000 | 71000 | 150000 | 82000 | 23.43 | 49.5 | 27.06 |
| 2001 | 71000 | 150000 | 82000 | 23.43 | 49.5 | 27.06 |
| 2002 | 41000 | 178000 | 82000 | 13.62 | 59.14 | 27.24 |
| 2003 | 41000 | 178000 | 82000 | 13.62 | 59.14 | 27.24 |
| 2004 | 41000 | 178000 | 94000 | 13.1 | 56.87 | 30.03 |
| 2005 | 41000 | 178000 | 94000 | 13.1 | 56.87 | 30.03 |
| 2006 | 42000 | 178000 | 94000 | 13.38 | 56.69 | 29.94 |
| 2007 | 35000 | 166000 | 90000 | 12.03 | 57.04 | 30.93 |
| 2008 | 35000 | 166000 | 90000 | 12.03 | 57.04 | 30.93 |
| 2009 | 35000 | 226000 | 112000 | 9.38 | 60.59 | 30.03 |
| 2010 | 35000 | 221000 | 104000 | 9.72 | 61.39 | 28.89 |
| 2011 | 35000 | 237000 | 96000 | 9.51 | 64.4 | 26.09 |
| 2012 | 35000 | 237000 | 96000 | 9.51 | 64.4 | 26.09 |
| 2013 | 35000 | 237000 | 112000 | 9.11 | 61.72 | 29.17 |
| 2014 | 35000 | 237000 | 112000 | 9.11 | 61.72 | 29.17 |
| 2015 | 35500 | 233600 | 114100 | 9.26 | 60.96 | 29.78 |
| 2016 | 35500 | 233500 | 114100 | 9.27 | 60.95 | 29.78 |
| 2017 | 35500 | 233500 | 114100 | 9.27 | 60.95 | 29.78 |