2,5% of Moroccan children aged 6 mo to 6 years suffer from rickets according to W.H.O. http://www.who.int/countryfocus/cooperation_strategy/ccs_mar_en.pdf
I am not sure of moroccan children , but we see lot of rickets inspite of sunshine year around this is because of extremely low levels of Vit d3 in mothers, high incidence of low birth weight babies, babies covered, and high rise buildings in urban area. I think the factors in morroccan babies must be similar