  
<prompt> Percentage of households with a female head
  
 [[1990, 6.4], [1997, 9.6], [2002, 11.5], [2007, 10.3], [2009, 11.4], [2012, 12.9]] 
 <response> Figure 4 shows that the percent of female headed households significantly increased in the intervals 1990-2002 and 2007-2012 (see Table 2). The percentage was 6.4% in 1990 which more than doubled to reach 12.9% in 2012. In the period between 2002 and 2007, the percentage significantly decreased by 1.1 percentage points before increasing again in 2009  