Why cherry-pick 5 years? Just look at their performance since inception. It is clearly laid out in their 13F. The company has trounced the S&P over such a long-term it is pretty incredible actually.

http://www.berkshirehathaway.com/2015ar/2015ar.pdf

1964-2015, the S&P500 returned 11,355% and BRK returned 1,598,284%.

p.s. not downvoting you, just disagreeing.