sentences:  The decadal growth rate for West Bengal in 2001-11 was 13.93%.The decadal growth rate for West Bengal was 17.84% in 1991-2001, 24.73% in 1981-1991 and 23.17% in 1971-1981.Only a small portion of the border with Bangladesh has been fenced and it is popularly referred to as a porous border.