gaugege各个颜色段如何计算分配echarts gauge配置项内容和展示

彩色拱形由4种颜色组成，具体所占百分比如何计算呢？

      var myRate1 = 1000;
option={
backgroundColor: '#031845',
series: [{
		type: 'gauge',
		center: ['50%', '55%'], // 默认全局居中  
		radius: '75%',
		splitNumber: 1, //刻度数量
		min: 0,
		max: 100,
		startAngle: 200,
		endAngle: -20,
		clockwise: true,
		axisLine: {
				show: true,
				lineStyle: {
						width: 2,
						shadowBlur: 0,
						color: [
								[1, '#fff']
						]
				}
		},
		axisTick: {
				show: true,
				lineStyle: {
						color: '#fff',
						width: 1
				},
				length: -15,
				splitNumber: 1
		},
		splitLine: {
				show: false,
				length: -20,
				lineStyle: {
						color: '#fff',
				}
		},
		axisLabel: {
				distance: -20,
				textStyle: {
						color: "#fff",
						fontSize: "15",
						fontWeight: "bold"
				}
		},
		pointer: { //仪表盘指针
				show: 0
		},
		detail: {
				show: false
		},
		data: [{
				name: "",
				value: myRate1
		}]
},  {
		name: '累计受理',
		type: 'gauge',
		startAngle: 200,
		endAngle: -20,
		radius: '72%',
		center: ['50%', '55%'], // 默认全局居中  

		min: 0,
		max: 1000,

		axisLine: {
				show: false,
				lineStyle: {
						width: 25,
						shadowBlur: 0,
						color: [
								[0.2, '#00FAFC'],
								[0.5, '#3BD542'],
								[0.6, '#E3F424'],
								[0.8, '#7E48DA'],
								[1, '#E531A8']
						]
				}
		},
		axisTick: {
				show: false,

		},
		splitLine: {
				show: false,
				length: 20,

		},

		axisLabel: {
				show: false
		},
		pointer: {
				show: false,
		},
		detail: {
				show: true,
				offsetCenter: [0, '40%'],
				textStyle: {
						fontSize: 30
				}
		},
		itemStyle: {
				normal: {
						color: "#03B7C9",

				}
		},
		data: [{
				value: 436
		}]
    }, 

	]
}