Terrestrial areas protected to total surface area, percentage
| Year | Value | Footnotes |
|---|
| 1990 | 20.1 | 1 |
| 1991 | 21 | 1 |
| 1992 | 21 | 1 |
| 1993 | 21 | 1 |
| 1994 | 21.1 | 1 |
| 1995 | 21.1 | 1 |
| 1996 | 21.5 | 1 |
| 1997 | 22.3 | 1 |
| 1998 | 22.6 | 1 |
| 1999 | 22.8 | 1 |
| 2000 | 22.9 | 1 |
| 2001 | 22.9 | 1 |
| 2002 | 22.9 | 1 |
| 2003 | 22.9 | 1 |
| 2004 | 22.9 | 1 |
| 2005 | 22.9 | 1 |
| 2006 | 22.9 | 1 |
| 2007 | 22.9 | 1 |
| 2008 | 22.9 | 1 |
| 2009 | 22.9 | 1 |
| 2010 | 22.9 | 1 |
Terrestrial areas protected, sq. km.
| Year | Value | Footnotes |
|---|
| 1990 | 16877 | 1 |
| 1991 | 17613 | 1 |
| 1992 | 17635 | 1 |
| 1993 | 17655 | 1 |
| 1994 | 17664 | 1 |
| 1995 | 17672 | 1 |
| 1996 | 17997 | 1 |
| 1997 | 18700 | 1 |
| 1998 | 18980 | 1 |
| 1999 | 19162 | 1 |
| 2000 | 19211 | 1 |
| 2001 | 19219 | 1 |
| 2002 | 19219 | 1 |
| 2003 | 19237 | 1 |
| 2004 | 19237 | 1 |
| 2005 | 19237 | 1 |
| 2006 | 19237 | 1 |
| 2007 | 19237 | 1 |
| 2008 | 19242 | 1 |
| 2009 | 19242 | 1 |
| 2010 | 19242 | 1 |
Source: United Nations Statistics Division
