Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Project 21900 icebreaker
Table title:
List of project 21900/21900M icebreakers
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > Project </th><th colspan=1 rowspan=1 > Builder </th><th colspan=1 rowspan=1 > IMO number </th><th colspan=1 rowspan=1 > Commissioned </th><th colspan=1 rowspan=1 > Home port </th><th colspan=1 rowspan=1 > Status </th></tr>
<tr> <td colspan=1 rowspan=1 > Moskva (ru) </td><td colspan=1 rowspan=1 > 21900 </td><td colspan=1 rowspan=1 > Baltic Shipyard, Saint Petersburg, Russia </td><td colspan=1 rowspan=1 > 9326574 </td><td colspan=1 rowspan=1 > 2008 </td><td colspan=1 rowspan=1 > Saint Petersburg </td><td colspan=1 rowspan=1 > In service </td></tr>
<tr> <td colspan=1 rowspan=1 > Sankt-Peterburg (ru) </td><td colspan=1 rowspan=1 > 21900 </td><td colspan=1 rowspan=1 > Baltic Shipyard, Saint Petersburg, Russia </td><td colspan=1 rowspan=1 > 9326586 </td><td colspan=1 rowspan=1 > 2009 </td><td colspan=1 rowspan=1 > Saint Petersburg </td><td colspan=1 rowspan=1 > In service </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Vladivostok (ru) </td><td colspan=1 rowspan=1 > 21900M </td><td colspan=1 rowspan=1 > Vyborg Shipyard, Vyborg, Russia </td><td colspan=1 rowspan=1 > 9658654 </td><td class="highlighted"  colspan=1 rowspan=1 > 2015 </td><td colspan=1 rowspan=1 > Saint Petersburg </td><td colspan=1 rowspan=1 > In service </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Murmansk </td><td colspan=1 rowspan=1 > 21900M </td><td colspan=1 rowspan=1 > Arctech Helsinki Shipyard, Helsinki, Finland </td><td colspan=1 rowspan=1 > 9658666 </td><td class="highlighted"  colspan=1 rowspan=1 > 2015 </td><td colspan=1 rowspan=1 > Murmansk </td><td colspan=1 rowspan=1 > In service </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Novorossiysk </td><td colspan=1 rowspan=1 > 21900M </td><td colspan=1 rowspan=1 > Vyborg Shipyard, Vyborg, Russia </td><td colspan=1 rowspan=1 > 9692571 </td><td class="highlighted"  colspan=1 rowspan=1 > 2016 </td><td colspan=1 rowspan=1 > Murmansk </td><td colspan=1 rowspan=1 > In service </td></tr>
</table>
Question:
When did Vladivostok, Murmansk, and Novorossiysk enter service?
Answer:
Vladivostok and Murmansk entered service in 2015, and the last one (Novorossiysk) in 2016.