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:
List of best-selling albums in the United States
Table title:
15–19 million copies
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Artist </th><th colspan=1 rowspan=1 > Album </th><th colspan=1 rowspan=1 > Label </th><th colspan=1 rowspan=1 > Shipments (Sales) </th><th colspan=1 rowspan=1 > Certification </th></tr>
<tr> <td colspan=1 rowspan=1 > 1987 </td><td class="highlighted"  colspan=1 rowspan=1 > Guns N' Roses </td><td class="highlighted"  colspan=1 rowspan=1 > Appetite for Destruction </td><td colspan=1 rowspan=1 > Geffen </td><td colspan=1 rowspan=1 > 18,000,000 </td><td colspan=1 rowspan=1 > 18× Platinum </td></tr>
<tr> <td colspan=1 rowspan=1 > 1997 </td><td colspan=1 rowspan=1 > Shania Twain </td><td colspan=1 rowspan=1 > Come On Over </td><td colspan=1 rowspan=1 > Mercury Nashville </td><td colspan=1 rowspan=1 > (17,690,000) </td><td colspan=1 rowspan=1 > 20× Platinum </td></tr>
<tr> <td colspan=1 rowspan=1 > 1974 </td><td colspan=1 rowspan=1 > Elton John </td><td colspan=1 rowspan=1 > Greatest Hits </td><td colspan=1 rowspan=1 > Polydor </td><td colspan=1 rowspan=1 > 17,000,000 </td><td colspan=1 rowspan=1 > 17× Platinum </td></tr>
<tr> <td colspan=1 rowspan=1 > 1976 </td><td colspan=1 rowspan=1 > Boston </td><td class="highlighted"  colspan=1 rowspan=1 > Boston </td><td colspan=1 rowspan=1 > Epic Records </td><td colspan=1 rowspan=1 > 17,000,000 </td><td colspan=1 rowspan=1 > 17× Platinum </td></tr>
<tr> <td colspan=1 rowspan=1 > 1990 </td><td colspan=1 rowspan=1 > Garth Brooks </td><td colspan=1 rowspan=1 > No Fences </td><td colspan=1 rowspan=1 > Capitol Nashville </td><td colspan=1 rowspan=1 > 17,000,000 </td><td colspan=1 rowspan=1 > 17× Platinum </td></tr>
<tr> <td colspan=1 rowspan=1 > 1991 </td><td colspan=1 rowspan=1 > Metallica </td><td colspan=1 rowspan=1 > Metallica </td><td colspan=1 rowspan=1 > Elektra </td><td colspan=1 rowspan=1 > (16,830,000) </td><td colspan=1 rowspan=1 > 16× Platinum </td></tr>
<tr> <td colspan=1 rowspan=1 > 1977 </td><td colspan=1 rowspan=1 > Soundtrack / Bee Gees </td><td colspan=1 rowspan=1 > Saturday Night Fever </td><td colspan=1 rowspan=1 > RSO </td><td colspan=1 rowspan=1 > 16,000,000 </td><td colspan=1 rowspan=1 > 16× Platinum </td></tr>
<tr> <td colspan=1 rowspan=1 > 1995 </td><td colspan=1 rowspan=1 > Alanis Morissette </td><td colspan=1 rowspan=1 > Jagged Little Pill </td><td colspan=1 rowspan=1 > Maverick </td><td colspan=1 rowspan=1 > (15,350,000) </td><td colspan=1 rowspan=1 > 16× Platinum </td></tr>
<tr> <td colspan=1 rowspan=1 > 1973 </td><td colspan=1 rowspan=1 > Pink Floyd </td><td colspan=1 rowspan=1 > The Dark Side of the Moon </td><td colspan=1 rowspan=1 > Harvest/Capitol </td><td colspan=1 rowspan=1 > 15,000,000 </td><td colspan=1 rowspan=1 > 15× Platinum </td></tr>
<tr> <td colspan=1 rowspan=1 > 1984 </td><td colspan=1 rowspan=1 > Bob Marley & The Wailers </td><td colspan=1 rowspan=1 > Legend </td><td colspan=1 rowspan=1 > Island </td><td colspan=1 rowspan=1 > 15,000,000 </td><td colspan=1 rowspan=1 > 15× Platinum </td></tr>
<tr> <td colspan=1 rowspan=1 > 1984 </td><td colspan=1 rowspan=1 > Bruce Springsteen </td><td colspan=1 rowspan=1 > Born in the U.S.A. </td><td colspan=1 rowspan=1 > Columbia </td><td colspan=1 rowspan=1 > 15,000,000 </td><td colspan=1 rowspan=1 > 15× Platinum </td></tr>
<tr> <td colspan=1 rowspan=1 > 1988 </td><td colspan=1 rowspan=1 > Journey </td><td colspan=1 rowspan=1 > Greatest Hits </td><td colspan=1 rowspan=1 > Columbia </td><td colspan=1 rowspan=1 > 15,000,000 </td><td colspan=1 rowspan=1 > 15× Platinum </td></tr>
</table>
Question:
How did the Boston album perform in terms of sales?
Answer:
The Boston album is the best-selling album in the United States, selling 17,000,000 shipments.