 
<prompt> Kason haife-haifen da ba na farko ba a cikin shekaru biyar da suka gabaci da suke ƙasa da watanni 24 bayan haihuwar da ta gabata | Kason haife-haifen da ba na farko ba a cikin shekaru biyar da suka gabaci da suke ƙasa da watanni 24 bayan haihuwar da ta gabata | (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> Duk da cewa, akwai raguwa ta sosai a tsakanin tazarar haihuwa a tsakanin 1990 da 2002, wannan kaso ya daɗe bai sauya ba a shekarun da suka biyo kamar yadda aka nuna a Jadawali na 4. Daga 2002 zuwa 2012 kusan ɗaya bisa uku na haife-haife sun auku ne a ƙasa da watanni 24 bayan haihuwar da ta gabata.  