List if-else not giving the expected result

I have the following list of list:

[['3', 2], ['2370447', 282], ['5300058', 610], ['81615', 615], ['3294332', 624], ['3078798', 624], ['1804986', 643]]

Please note that in index 5 and 6, the second item is identical. I am trying to turn this list ordered on the second item in each list into a ranking.

I used the following if-else to correct for time when values were the same:

for i in range(len(sortedCounts)):
   if i == 0:
          sortedCounts[i][1] = 0
   elif sortedCounts[i][1] == sortedCounts[i-1][1]:
          sortedCounts[i][1] = i-1
   else: 
          sortedCounts[i][1] = i

However, when I print the list, I am still getting different rankings even when the numbers are the same:

[['3', 0], ['2370447', 1], ['5300058', 2], ['81615', 3], ['3294332', 4], ['3078798', 5], ['1804986', 6]]

Expected output is: [['3', 0], ['2370447', 1], ['5300058', 2], ['81615', 3], ['3294332', 4], ['3078798', 4], ['1804986', 6]]

Appreciate any advice, or if there is a better way, please advise.