## Data Definition


#### Country
Type: `string`

Default validate:  
```js
function (d) {
          return this.accessor(d) !== undefined;
        }
```

Default accessor:  
```js
function (line) {
          return line[0] === undefined ? undefined : String(line[0]);
        }
```

#### Value
Type: `number`

Default validate:  
```js
function (d) {
          return !isNaN(this.accessor(d)) && this.accessor(d) >= 0;
        }
```

Default accessor:  
```js
function (line) {
          return parseFloat(line[1]);
        }
```