hello,
i have a problem that many values are showing superposed in place of one value .the image represent the problème.
this is my code vega:
{
  $schema: https://vega.github.io/schema/vega-lite/v2.json
  "autosize":
  {
    "type": "pad",
    "resize": false
  },
  "data":
  {
    "url": {
      "%context%": true,
      "index": "index"
      "body":
      {
        "aggs" : {
          "eqpt_buckets": {
            "composite" : {
              "size": 5000,
              "sources" :
              [
                {
                  "code_pays":
                  {"terms" :
                  {
                    "field": "code_pays.keyword"
                  }
                  }
                },
                {
                  "proposed_contacts_total":
                  {"terms" :
                  {
                    "field": "proposed_contacts_total"
                  }
                  }
                },
                {
                  "customers_total":
                  {"terms" :
                  {"field": "customers_total"
                  }
                  }
                }
              ]
            }
          }
        }
      }
    }
    "format": {property: "aggregations.eqpt_buckets.buckets"}
  },
  "transform":
  [
    {"filter": "datum.key.proposed_contacts_total >= 0"},
    {"calculate": "datum.key.code_pays",
      "as": "code_pays.keyword"
    },
    {"calculate": "datum.key.proposed_contacts_total",
      "as": "proposed_contacts_total"},
    {"calculate": "datum.key.customers_total",
      "as": "customers_total"},
    {
      "window": [{"op": "sum", "field": "proposed_contacts_total", "as": "num",}],
      "groupby": ["code_pays"],
    }
    {
      "window": [{"op": "sum", "field": "customers_total", "as": "denum"}],
      "groupby": ["code_pays"],
    }
    {"calculate": "datum.num/datum.denum * 100", "as": "result"},
  ],
  "mark": "bar",
  "encoding": {
    "x": {
      "field": "result",
      "title":"",
      "type":"quantitative",
      "scale":{"padding":10},
    }
    "y": {"field": "code_pays.keyword" , "type":"ordinal","title":""}
    "tooltip": {"field": "result", "type": "quantitative","format":".2f"}
  },
  "layer": [{
    "mark": "bar"
  },
    {
      "mark": {
        "type": "text",
        "align": "left",
        "xOffset": 0,
        "dx":3
        "aria": false
      },
      "encoding": {
        "text": {"field": "result", "type": "quantitative","format":".2f"}
      }
    }]
}

thank you for help.