| YEAR | ONE MONTH OR LESS | BETWEEN ONE AND THREE MONTHS | BETWEEN THREE MONTHS AND ONE YEAR | OVER ONE YEAR | NOT STATED | TOTALS | |
|---|---|---|---|---|---|---|---|
| 1 | 2001 | 4.2 | 2.6 | 4.9 | 1.7 | 0.9 | 14.3 |
| 2 | 2002 | 3.5 | 3.3 | 5.6 | 1.9 | 0.4 | 14.8 |
| 3 | 2003 | 7.1 | 2.4 | 4.0 | 1.9 | 0.7 | 16.0 |
| 4 | 2004 | 6.3 | 2.2 | 2.8 | 1.0 | 2.0 | 14.3 |
| 5 | 2005 | 2.7 | 3.7 | 3.1 | 1.8 | 2.9 | 14.2 |
| 6 | 2006 | 6.6 | 1.7 | 2.5 | 1.0 | 0.7 | 12.5 |
| 7 | 2007 | 2.3 | 2.9 | 2.5 | 1.5 | 1.6 | 10.7 |
| 8 | 2008 | 2.4 | 2.7 | 3.1 | 1.5 | 2.0 | 11.7 |
| 9 | 2009 | 2.8 | 3.3 | 3.9 | 1.9 | 2.4 | 14.2 |
| 10 | 2010 | 2.7 | 2.8 | 5.0 | 2.5 | 2.3 | 15.3 |
| 11 | 2011 | 2.5 | 3.3 | 5.9 | 2.7 | 1.7 | 16.1 |
| 12 | 2012 | 2.4 | 3.6 | 5.6 | 3.2 | 1.7 | 16.4 |
| 13 | 2013 | 2.8 | 2.9 | 5.5 | 3.6 | 1.8 | 16.6 |
| 14 | 2014 | 2.6 | 2.9 | 6.7 | 3.4 | 1.9 | 17.6 |
| 16 | 2015 | 2.4 | 2.9 | 5.7 | 3.4 | 2.0 | 16.4 |
| 17 | 2016 | 2.4 | 2.2 | 4.7 | 3.0 | 2.0 | 14.3 |
| 18 | 2017 | 2.7 | 2.4 | 4.7 | 2.3 | 2.2 | 14.4 |
