Unsurprisingly, it's already on their site. Go here...http://www.officialcharts.com/archive/music/
...and select the year you want from Official UK Singles on the left, or Official UK Albums on the right. Within the year you can view the weekly charts.
At the top right of the page in the above link, you can also search by artist or title, single or album. The information's not as good as it used to be on ChartStats, mind, or as easy to use.