{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "style": {
    "display": "flex",
    "padding": "4px",
    "align-items": "center"
  },
  "children": [
    {
      "elmType": "div",
      "style": {
        "display": "inline-block",
        "border-radius": "100%",
        "fill": "currentColor",
        "width": "100px",
        "height": "100px"
      },
      "attributes": {
        "class": "ms-bgColor-themeLight ms-fontColor-themePrimary"
      },
      "children": [
        {
          "elmType": "svg",
          "children": [
            {
              "elmType": "path",
              "attributes": {
                "d": "='M 0,50' + 'a '+ pow(50*@currentField,0.5) + ','+pow(50*@currentField,0.5) + ' 0 1,1 ' + 100*pow(@currentField,0.5) +',0' + 'a '+ pow(50*@currentField,0.5) + ','+pow(50*@currentField,0.5) + ' 0 1,1 ' + -100*pow(@currentField,0.5) +',0'"
              }
            }
          ]
        }
      ]
    },
    {
      "elmType": "div",
      "txtContent": "@currentField.displayValue",
      "style": {
        "position": "absolute",
        "z-index": "10",
        "left": "45px",
        "width": "40px",
        "text-align": "center",
        "white-space": "nowrap",
        "border-radius": "0.2em"
      },
      "attributes": {
        "class": "ms-bgColor-white ms-fontColor-themeDarker"
      }
    }
  ]
}