Economic Survey 2021: Significant improvement in access to housing for lowest-income group Since 2014-15, construction of approximately 1.94 crore rural houses have been completed, out of which 1.22 crore houses have been constructed under the revamped scheme of PMAY-Gramin DDA Housing Scheme Economic Survey 2021’s Housing Index states that the improvement in access to housing has been disproportionately greater for the lowest income group when compared to the highest income group, thereby enhancing equity in access to housing, one of the ‘bare necessities’ such as water, sanitation, electricity and clean cooking fuel. To measure the progress in the delivery of “the bare necessities”, the Survey develops a composite index called the Bare Necessities Index (BNI).