How to create a line for range of years in d3.js?

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// Define the data for the line
var yearsData = [2000, 2005, 2010, 2015, 2020];

// Define the scales for the x and y axes
var xScale = d3.scaleLinear()
    .domain([2000, 2020])
    .range([0, 400]);

var yScale = d3.scaleLinear()
    .domain([0, 100])
    .range([200, 0]);

// Define the line function
var line = d3.line()
    .x(function(d) { return xScale(d); })
    .y(function(d) { return yScale(50); });

// Append the line to the SVG element
var svg = d3.select("body")
    .append("svg")
    .attr("width", 400)
    .attr("height", 200);

svg.append("path")
    .datum(yearsData)
    .attr("d", line)
    .attr("fill", "none")
    .attr("stroke", "steelblue")
    .attr("stroke-width", 2);