| Value |
Category |
| -99 |
-99.Don't know |
| -97 |
-97.Ongoing |
| -55 |
-55.Missing |
| 2006 |
|
| 2008 |
|
| 2009 |
|
| 2010 |
|
| 2011 |
|
| Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.