title: How to select only year on mat-datepicker
body: <p>I'm developing an application with angular 8 in which I have an input that contains only year number.
  I have used mat-datepicker and want only to choose year.</p>
  <pre><code>&lt;mat-form-field class=&quot;input-control&quot;&gt;
        &lt;input matInput placeholder=&quot;{{'enter'|translate}}..&quot; [formControl]=&quot;form.controls.openedAt&quot;
               [matDatepicker]=&quot;date&quot; readonly&gt;
        &lt;mat-datepicker-toggle matSuffix [for]=&quot;date&quot;&gt;&lt;/mat-datepicker-toggle&gt;
        &lt;mat-datepicker #date startView=&quot;multi-year&quot;&gt;&lt;/mat-datepicker&gt;
      &lt;/mat-form-field&gt;
  </code></pre>
  <p>this code shows year view first, but when I choose the year, the month view will be opened, then days view.</p>
  <p>So how can I select only year, or show only year view on mat-datepicker?</p>