  
<prompt> Mean number of de jure household members per sleeping room, by urban and rural place of residence, with the total plotted with 95% confidence intervals
  
 [["", "Urban", "Rural", "Total"], [1997, 3, 3.4, 3], [2002, 2.6, 3, 2.7], [2007, 2.6, 2.9, 2.7], [2009, 2.5, 2.8, 2.5], [2012, 2.4, 2.6, 2.4]] 
 <response> Figure 3 shows that except for the period between 2002 and 2007, the mean number of persons per sleeping room has significantly decreased from 3.0 in 1997 to 2.4 in 2012  