PowerShell/SCSM - Get Manual Activities Completed per Assigned user in the last month

I wanted to expend a bit on the previous post which retrieved all the Manual Activities completed in the last month.

I want to go a step further and get the top Users who closed the most Manual Activities in that period.

# Smlets Module
Import-module -name Smlets

# Get the Manual Activity Class
$MAClass = Get-SCSMClass -Name System.WorkItem.Activity.ManualActivity$

# Get the Manual Activity Completed Status Enumeration
$MAStatusCompleted = Get-SCSMEnumeration -Name ActivityStatusEnum.Completed$

# Get the starting date from where we are searching
$MAModifiedDay = (Get-date).Adddays(-30)

# Get the Criteria Class
$CriteriaClass = "Microsoft.EnterpriseManagement.Common.EnterpriseManagementObjectCriteria"

# Define the Filter
$Filter = "Status = '$($MAStatusCompleted.Id)' AND LastModified > '$MAModifiedDay'"

# Create de Criteria Object
$CriteriaObject = new-object $CriteriaClass $Filter, $MAClass

# AssignedUser RelationshipClass
$RelationshipClass_AssignedUser = Get-SCSMRelationshipClass -Name System.WorkItemAssignedToUser$

# Search for Manual Activities, show the Ticket ID and the AssignedTo User's displayname
# Group per AssignedTo User and sort per Count
Get-SCSMObject -criteria $CriteriaObject|
    Select-Object -property Name, @{
        Label="AssignedTo";
        E={
            (Get-ScsmRelatedObject -SMObject $_ -Relationship $RelationshipClass_AssignedUser).displayname
        }
    }|
    Group-Object -Property AssignedTo |
    Sort-Object -Property Count -Descending

This gives me the top users who closed Manual Activities