what is the return of bitcoin since it 2014

In 2014, Gartner (IT) returned 18.8% and Bitcoin (BTC) returned -57.6%.

DATE Bitcoin Gartner
December 31 2014
$320.19
$84.21
December 30 2014
$310.74
$85.01
December 29 2014
$312.67
$85.56
December 28 2014
$317.24
December 27 2014
$315.86
December 26 2014
$327.92
$85.42
December 25 2014
$319.01
December 24 2014
$322.53
$85.92
December 23 2014
$334.57
$85.69
December 22 2014
$331.89
$85.69
December 21 2014
$320.84
December 20 2014
$329.96
December 19 2014
$317.84
$86.51
December 18 2014
$311.40
$87.40
December 17 2014
$319.78
$85.13
December 16 2014
$327.06
$82.97
December 15 2014
$345.35
$84.28
December 14 2014
$351.63
December 13 2014
$347.38
December 12 2014
$352.54
$82.72
December 11 2014
$350.51
$84.50
December 10 2014
$346.36
$83.88
December 09 2014
$352.22
$83.87
December 08 2014
$361.91
$83.35
December 07 2014
$375.10