  1st Qu.:2   1st Qu.:1987   1st Qu.:7   1:530   1st Qu.:23.06  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  Median :3   Median :2038   Median :7           Median :27.04  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  Mean   :3   Mean   :2038   Mean   :7           Mean   :27.36  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  3rd Qu.:4   3rd Qu.:2089   3rd Qu.:7           3rd Qu.:30.82  </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  Ma