 
<prompt> Percentage of non-first births in the five years preceding the survey that are less than 24 months after the preceding birth | (1990.0, 49.8) (1997.0, 44.3) (2002.0, 33.5) (2007.0, 32.8) (2009.0, 33.2) (2012.0, 32.0) <response> Although there was a significant decrease in closely spaced births between 1990 and 2002, this percentage has remaining relatively unchanged in the following years as shown in Table 4. From 2002 to 2012 almost one-third of births occurred less than 24 months after the preceding birth.  