From the dataset abstract

(1)The charts show the proportion of households (HHs) that are receiving non food items (NFI) versus the numbers of (severe and moderate) earthquake-damaged houses, at sub-district level....

Source: Indonesia: Sumatra Earthquake - Shelter Cluster - Non Food Item Distribution Gap Analysis as at 28 Oct 2009 Indonesia: Gempa Sumatra Shelter Cluster - Distribusi Barang Bukan Makanan Analisa Gap pada 28 Okt 2009