Sure, here is the JSON formatted list:

```json
{
  "richest_countries_by_gni_per_capita": [
    {
      "rank": 1,
      "country": "Liechtenstein",
      "gni_per_capita": "116,440"
    },
    {
      "rank": 2,
      "country": "Switzerland",
      "gni_per_capita": "90,600"
    },
    {
      "rank": 3,
      "country": "Luxembourg",
      "gni_per_capita": "73,500"
    },
    {
      "rank": 4,
      "country": "Norway",
      "gni_per_capita": "83,880"
    },
    {
      "rank": 5,
      "country": "Ireland",
      "gni_per_capita": "76,110"
    },
    {
      "rank": 6,
      "country": "United States",
      "gni_per_capita": "70,930"
    },
    {
      "rank": 7,
      "country": "Denmark",
      "gni_per_capita": "68,300"
    },
    {
      "rank": 8,
      "country": "Singapore",
      "gni_per_capita": "64,010"
    },
    {
      "rank": 9,
      "country": "Iceland",
      "gni_per_capita": "63,220"
    },
    {
      "rank": 10,
      "country": "Qatar",
      "gni_per_capita": "62,090"
    }
  ],
  "top_10_countries_by_nominal_gdp": [
    {
      "rank": 1,
      "country": "United States",
      "nominal_gdp": "23.7 trillion"
    },
    {
      "rank": 2,
      "country": "China",
      "nominal_gdp": "16.2 trillion"
    },
    {
      "rank": 3,
      "country": "Japan",
      "nominal_gdp": "5.2 trillion"
    },
    {
      "rank": 4,
      "country": "Germany",
      "nominal_gdp": "4 trillion"
    },
    {
      "rank": 5,
      "country": "United Kingdom",
      "nominal_gdp": "3 trillion"
    },
    {
      "rank": 6,
      "country": "India",
      "nominal_gdp": "2.9 trillion"
    },
    {
      "rank": 7,
      "country": "France",
      "nominal_gdp": "2.8 trillion"
    },
    {
      "rank": 8,
      "country": "Italy",
      "nominal_gdp": "2 trillion"
    },
    {
      "rank": 9,
      "country": "Canada",
      "nominal_gdp": "1.8 trillion"
    },
    {
      "rank": 10,
      "country": "South Korea",
      "nominal_gdp": "1.7 trillion"
    }
  ]
}
```
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