Dynamic columns in web table during grabbing data

Hello!
I want to grab data from the WEB page and make a function (to change adress Source = Web.BrowserContents("https://www.biznesradar.pl/raporty-finansowe-rachunek-zyskow-i-strat/KERNEL,Q") ) from the query, but I have a problem with the step (#"Extracted Table From Html"), because a number of columns can be different, for example sometimes it can be 10, sometimes 30, etc.
{"Column14", "TABLE.report-table > * > TR > :nth-child(14)"}
How to make this part dynamic?

let
    Source = Web.BrowserContents("https://www.biznesradar.pl/raporty-finansowe-rachunek-zyskow-i-strat/KERNEL,Q"),
    #"Extracted Table From Html" = Html.Table(Source, {{"Column1", "TABLE.report-table > * > TR > :nth-child(1)"},
     {"Column2", "TABLE.report-table > * > TR > :nth-child(2)"}, {"Column3", "TABLE.report-table > * > TR > :nth-child(3)"},
      {"Column4", "TABLE.report-table > * > TR > :nth-child(4)"}, {"Column5", "TABLE.report-table > * > TR > :nth-child(5)"},
       {"Column6", "TABLE.report-table > * > TR > :nth-child(6)"}, {"Column7", "TABLE.report-table > * > TR > :nth-child(7)"},
        {"Column8", "TABLE.report-table > * > TR > :nth-child(8)"}, {"Column9", "TABLE.report-table > * > TR > :nth-child(9)"},
         {"Column10", "TABLE.report-table > * > TR > :nth-child(10)"}, {"Column11", "TABLE.report-table > * > TR > :nth-child(11)"}, 
         {"Column12", "TABLE.report-table > * > TR > :nth-child(12)"}, {"Column13", "TABLE.report-table > * > TR > :nth-child(13)"},
          {"Column14", "TABLE.report-table > * > TR > :nth-child(14)"}, {"Column15", "TABLE.report-table > * > TR > :nth-child(15)"}},
           [RowSelector="TABLE.report-table > * > TR"]),
    #"Promoted Headers" = Table.PromoteHeaders(#"Extracted Table From Html", [PromoteAllScalars=true]),
    #"Unpivoted Other Columns" = Table.UnpivotOtherColumns(#"Promoted Headers", {""}, "Attribute", "Value"),
    #"Filtered Rows" = Table.SelectRows(#"Unpivoted Other Columns", each ([Value] <> ""))
in
    #"Filtered Rows"