Power Query: Need help in transformation

Anonymous , try this code

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WUtJR8irN0zW0BDNyIAzH0nQQI1YnWsk5vzSvpKjSESgKRWDRxJLU9PyiSkOggCGYMAIRxiiSICEjMGEMIkxQJEFCxmDCBESYIlvmhMcyAwgJts4A0z5DIwhpDCYxrTQ0hjgUwgbKxwIA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t, Column2 = _t, Column3 = _t, Column4 = _t]),
    #"Promoted Headers" = Table.PromoteHeaders(Source, [PromoteAllScalars=true]),
    #"Changed Type" = Table.TransformColumnTypes(#"Promoted Headers",{{"", type text}, {"Jun-19", Int64.Type}, {"Jul-19", Int64.Type}, {"Aug-19", Int64.Type}}),
    #"Renamed Columns" = Table.RenameColumns(#"Changed Type",{{"", "Category"}}),
    #"Added Custom" = Table.AddColumn(#"Renamed Columns", "Country", each if [#"Jun-19"] = null then [Category] else null),
    #"Filled Down" = Table.FillDown(#"Added Custom",{"Country"}),
    #"Filtered Rows" = Table.SelectRows(#"Filled Down", each [#"Jun-19"] <> null and [#"Jun-19"] <> ""),
    #"Unpivoted Other Columns" = Table.UnpivotOtherColumns(#"Filtered Rows", {"Country", "Category"}, "Attribute", "Value"),
    #"Pivoted Column" = Table.Pivot(#"Unpivoted Other Columns", List.Distinct(#"Unpivoted Other Columns"[Country]), "Country", "Value", List.Sum)
in
    #"Pivoted Column"