Vega-Lite spec from Wed Sep 16 2020

spec.json

{
	"$schema": "https://vega.github.io/schema/vega-lite/v4.json",
	"title": {
		"text": "Market Access",
		"dy": -12
	},
	"description": "Sample pie chart",
	"background": "#FFF",
	"width": 300,
	"height": 300,
	"padding": {
		"top": 24,
		"right": 24,
		"bottom": 24,
		"left": 24
	},
	"data": {
		"values": [{
				"category": "Market_access_Y",
				"value": 62.5,
				"labeldesc": "0.0M / 0.0%-reporting challenges"
			},
			{
				"category":  "Market_access_N",
				"value": 44.44,
				"labeldesc": "2.4M / 93.8%-reporting no challenges"
			}
		]
	},
	"encoding": {
		"theta": {
			"field": "value",
			"type": "quantitative",
			"stack": true
		},
		"color": {
			"field": "value",
			"type": "nominal",
			"scale": {
				"range": ["#bada55", "#acab68", "#99C3E1", "#90D1C5"]
			},
			"legend": null
		},
		"order": {
			"field": "quantity",
			"sort": "descending"
		}
	},
	"layer": [{
			"mark": {
				"type": "arc",
				"outerRadius": 100,
				"innerRadius": 80
			}
		}, {
			"mark": {
				"type": "text",
				"radius": 110,
				"fontSize": 12,
				"lineBreak": "-",
				"fill": "#005589"
			},
			"encoding": {
				"text": {
					"field": "labeldesc",
					"type": "nominal"
				}
			}
		}, {
			"mark": {
				"type": "image",
				"width": 40,
				"height": 40,
				"x": 150,
				"y": 150,
				"align": "center",
				"baseline": "middle",
				"opacity": 0.5
			},
			"encoding": {
				"url": {
					"value": "https://vega.github.io/images/idl-logo.png"
				}
			}
		}

	],
	"view": {
		"stroke": null
	}
}