As one of many results of the continuous development of Rwanda, especially the health system, women will live much longer in the coming years.
Since the 1978 there has been a trend towards later first marriage for both men and women. The fourth Population and Housing Census conducted in Rwanda in August 2012 (2012RPHC) realized that the average age of first marriage for women climbed from 22.9 years in 1991 to 25 years in 2012, while for men it was 27.4 years in 2012 from 26.8 years both in 1991 and 2002.
The fourth Population and Housing Census conducted in August 2012 (2012 RPHC), revealed that the total population of Rwanda was at that moment 10,515,973 persons.
Rwandan population is composed of mostly women, according to the provisional results of the recently conducted General Population and Housing Census.
Less common but more useful than the methods used to develop traditional map is the new Global Positioning System (GPS) based data capturing technology which has been used by the National Institute of Statistics of Rwanda (NISR) in mapping the Enumeration Areas (EA) in the preparatory stages of the fourth Population and Housing Census of Rwanda which is slated to begin on August 15, 2012.
A population census is expected to provide a precise answer to this question amongst other important questions. In fact, the United Nations defines the essential features of population and housing censuses as "individual enumeration, universality within a defined territory, simultaneity and defined periodicity", and recommends that population censuses be taken at least every 10 years.