 
<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, 1997, 3) (Rural, 1997, 3.4) (Total, 1997, 3) (Urban, 2002, 2.6) (Rural, 2002, 3) (Total, 2002, 2.7) (Urban, 2007, 2.6) (Rural, 2007, 2.9) (Total, 2007, 2.7) (Urban, 2009, 2.5) (Rural, 2009, 2.8) (Total, 2009, 2.5) (Urban, 2012, 2.4) (Rural, 2012, 2.6) (Total, 2012, 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  