Oklahoma - Human Development Index
| 2015 | 0.896 |
| 2014 | 0.895 |
| 2013 | 0.892 |
| 2012 | 0.889 |
| 2011 | 0.886 |
| 2010 | 0.881 |
| 2009 | 0.879 |
| 2008 | 0.880 |
| 2007 | 0.878 |
| 2006 | 0.875 |
| 2005 | 0.871 |
| 2004 | 0.869 |
| 2003 | 0.868 |
| 2002 | 0.864 |
| 2001 | 0.863 |
| 2000 | 0.860 |
| 1999 | 0.861 |
| 1998 | 0.862 |
| 1997 | 0.860 |
| 1996 | 0.859 |
| 1995 | 0.858 |
