x1

x2

x3

x4

x1

1.0000

0.9973

0.9919

0.9968

x2

0.9973

1.0000

0.9875

0.9967

x3

0.9919

0.9875

1.0000

0.9959

x4

0.9968

0.9967

0.9959

1.0000