Installation:
1. Add the following code to the desired location of the stats.tpl statistics output template:
<script src="https://cdn.jsdelivr.net/npm/[email protected]"></script>
<article class="box story">
    <div class="box_in dark_top stats_head">
        <canvas id="main" style="width: 240px;"></canvas>
    </div>
    <div class="box_in">
        <div class="statistics">
            <div class="stat_group">
                <canvas id="news" style="width: 240px;"></canvas>
            </div>
        </div>
    </div>
    <div class="box_in dark_top stats_head">
        <canvas id="users" style="width: 240px;"></canvas>
    </div>
</article>
<style type="text/css">
    .canvas {
        width: 70%;
    }
</style>

<script>
var ctx = document.getElementById("main").getContext("2d");
var data = {
  labels: ["Day", "Week", "Month"],
  datasets: [{
    label: "Users",
    backgroundColor: "#f6a71a",
    dаta: [{user_day}, {user_week}, {user_month}]
  }, {
    label: "Newes",
    backgroundColor: "#ce3f28",
    dаta: [{news_day}, {news_week}, {news_month}]
  }, {
    label: "Comments",
    backgroundColor: "#3394e6",
    dаta: [{comm_day}, {comm_week}, {comm_month}]
  }]
};

var myBarChart = new Chart(ctx, {
  type: 'bar',
  dаta: data,
  options: {
    barValueSpacing: 20,
    scales: {
      yAxes: [{
        ticks: {
          min: 0,
        }
      }]
    }
  }
});

</script>

<script>
var ctx = document.getElementById("users").getContext("2d");
var data = {
  labels: ['All User', 'Ban User'],
        datasets: [{
            label: 'Users',
            backgroundColor: '#f6a71a',
            borderColor: '#fff',
            dаta: [{user_num}, {user_banned}]
  }]
};

var myBarChart = new Chart(ctx, {
  type: 'bar',
  dаta: data,
  options: {
    barValueSpacing: 20,
    scales: {
      yAxes: [{
        ticks: {
          min: 0,
        }
      }]
    }
  }
});
</script>

<script>
var ctx = document.getElementById('news').getContext('2d');
var myDoughnutChart = new Chart(ctx, {
    type: 'doughnut',
    dаta: {
        labels: ['All News', 'Approved', 'On moderation','Comment'],
        datasets: [{
            label: 'News',
            backgroundColor: [
                '#f6a71a', // Color Of Label - News
                '#ce3f28',
                '#3394e6',
                '#4CAF50'
            ],
            borderColor: [
                '#fff',
                '#fff',
                '#fff'
            ],

            dаta: [{news_num}, {news_allow}, {news_moder},{comm_num}]
        }]

    },
    
    options: {}
});
</script>