In this task, you are given an input list. A list contains several comma-separated items written within brackets. You need to return the count of all the numerical elements in the given list. Return 0 if no numerical element in the list.
['5215', 'Z', '4871', '9175', '3639', '8217', '9137', 'X', '8465', '1331', 'X', 'U', '2837', '2609', 'Q', 'M', '6631', 'a']