unh vs gspc in 1990s

In the 1990s, UnitedHealth (UNH) returned 1,664.4% and the S&P 500 (GSPC) returned 315.7%.

DATE the S&P 500 UnitedHealth
December 1999
$1,469.25
$5.22
November 1999
$1,388.91
$5.10
October 1999
$1,362.93
$5.08
September 1999
$1,282.71
$4.78
August 1999
$1,320.41
$5.97
July 1999
$1,328.72
$5.99
June 1999
$1,372.71
$6.15
May 1999
$1,301.84
$5.73
April 1999
$1,335.18
$5.51
March 1999
$1,286.37
$5.17
February 1999
$1,238.33
$4.84
January 1999
$1,279.64
$4.39
December 1998
$1,229.23
$4.23
November 1998
$1,163.63
$4.43
October 1998
$1,098.67
$4.22
September 1998
$1,017.01
$3.44
August 1998
$957.28
$3.55
July 1998
$1,120.67
$5.55
June 1998
$1,133.84
$6.25
May 1998
$1,090.82
$6.28
April 1998
$1,111.75
$6.90
March 1998
$1,101.75
$6.36
February 1998
$1,049.34
$5.95
January 1998
$980.28
$5.03
December 1997
$970.43
$4.87