Total Customers By Year

I'm trying to find the number of customers by year. The graph shows how many customers that started service in that year (red line). What I need is for the previous year values to add up each year so that the number of customers is cumulative. 

This query gives me the chart below. How can I edit it to give me the cumulative values? 

let
Source =redacted for privacy,
#"Master Customer List - MASTER_Sheet" = Source{[Item="Master Customer List - MASTER",Kind="Sheet"]}[Data],
#"Promoted Headers" = Table.PromoteHeaders(#"Master Customer List - MASTER_Sheet", [PromoteAllScalars=true]),
#"Changed Type" = Table.TransformColumnTypes(#"Promoted Headers",{{"Parent Account Name", type text}, {"Vertical Segment", type text}, {"Date Added", Int64.Type}, {"CTC", type text}, {"BDM", type text}, {"Account Executive", type text}, {"New Logo?", type text}, {"Lead Source", type text}, {"Contract Vehicle Customer?", type text}, {"Proposal Team Used?", type text}, {"BD Team Push?", type text}, {"UL2050?", type text}, {"BD Initiative?", type text}, {"Which Contract Vehicle?", type text}, {"ACS", type text}, {"VMS", type text}, {"Fire", type text}, {"Other", type text}, {"Notes:", type any}, {"Created By", type text}, {"Modified By", type text}, {"Created", type number}, {"Modified", type number}}),
#"Changed Type1" = Table.TransformColumnTypes(#"Changed Type",{{"Date Added", type datetime}, {"Created", type datetime}, {"Modified", type datetime}, {"2022 Bookings", Currency.Type}, {"2021 Bookings", Currency.Type}, {"2020 Bookings", Currency.Type}, {"2019 Bookings", Currency.Type}, {"2018 Bookings", Currency.Type}, {"2023 Bookings", Currency.Type}}),
#"Added Year" = Table.AddColumn(#"Changed Type1", "Year", each Date.Year([Date Added])),
#"Removed Blank Rows" = Table.SelectRows(#"Added Year", each not List.IsEmpty(List.RemoveMatchingItems(Record.FieldValues(_), {"", null}))),
#"Changed Type2" = Table.TransformColumnTypes(#"Removed Blank Rows",{{"Year", Int64.Type}}),
#"Replaced Value" = Table.ReplaceValue(#"Changed Type2",null,0,Replacer.ReplaceValue,{"Year"}),
#"Grouped Rows" = Table.Group(#"Replaced Value", {"Year"}, {{"Total Customers", each Table.RowCount(_), Int64.Type}}),
#"Sorted Rows" = Table.Sort(#"Grouped Rows",{{"Year", Order.Ascending}})
in
#"Sorted Rows"

Things that might be important to note?

- The extracted "Year" column is Whole Number as the type.

- There will be blanks because I dont have the "Date Added" (the date they became our customer) for all customers so the blanks should be the baseline number.

Thank you in advance for any help!!!