 
<prompt> De jure na nufin girman gida ga shekarun bincike na 1990, 1997, 2002, 2007, 2009, and 2012, tare da kashi 95% na tabbacin tazara | De jure na nufin girman gida ga shekarun bincike na 1990, 1997, 2002, 2007, 2009, and 2012, tare da kashi 95% na tabbacin tazara | (1990.0, 6.9) (1997.0, 6.0) (2002.0, 5.7) (2007.0, 5.3) (2009.0, 5.1) (2012.0, 5.1) <response> Hoto na 2 ya nuna cewa, gidaje masu nufin de jure (ko gidaje na yau da kullum) girmansu na raguwa sosai daga 6.9 a 1990 zuwa 5.1 a 2009, amma kuma ba su sauya ba a tsakanin 2009 zuwa 2012  