Finding repeatability estimates of repeated measurements

[jaelee22]

I have a date set on several repeated measures on different days. 

Date     Side    measurements

1/2          x            21.2

1/2          x            22.3

1/2          y            20.0

1/6          x            21.0

1/6          y            19.7

1/8          x            20.1

1/8          y            22.2

1/8          y            24.7

like so. I am using proc glm, but I am not sure if I have done it correctly. I tried to do the calculation manually and get the pooled standard deviation in excel.

proc glm data= have; 
 class side; 
 model measurements = side date; 
run; 

What do I have to use to get the within subject standard deviation, coefficient of variation, coefficient of repeatability and ICC of each side; not combined.

Any help is much appreciated. 

Thank you