Domains
| Year | 1981 | 1986 | 1991 | 1996 | 1997 | 1998 | 1999 | 2000 |
| % | 5.81 | 3.71 | 4.55 | 4.39 | 4.17 | 4.48 | 4.90 | 7.62 |
| Year | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 |
| % | 6.50 | 5.83 | 6.07 | 7.24 | 7.81 | 9.09 | 9.66 | 9.81 |
| Year | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 |
| % | 12.50 | 13.89 | 14.42 | 12.60 | 7.68 | 7.23 | 7.33 | 7.52 |
| Year | 2017 | 2018 | ||||||
| % | 7.91 | 8.09 |
Operational Definitions
The percentage of births of children registered who were born out of wedlock.
