Determining Elements in Python's Two-Dimensional Matrix

The li below is a two-dimensional array, representing a matrix of six rows and three columns, and I would like to determine that the second column in the second to fifth rows is all zero.

 li = [[1,1,1],
    [2,0,1],
    [3,0,1],
    [4,0,1],
    [5,0,1],
    [6,1,1]]

count = 0
row1 = 2
row2 = 5
col=2
for i in range (row1-1, row2):
    if li[i][col-1] == 0:count+=1

if count==row2+1-row1:
    print("All 0")

The results will come out just in case, but is there a better way?
Thank you for your cooperation.