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| Month | 2019 | 2020 (no action for covid) | 
|---|---|---|
| 
 Jan  | 
99.20 | 98.97 | 
| 
 Feb  | 
99.87 | 99.52 | 
| 
 Mar  | 
101.47 | 100.94 | 
| 
 Apr  | 
101.03 | 99.90 | 
| 
 May  | 
100.25 | 98.57 | 
| 
 Jun  | 
100.69 | 99.82 | 
| 
 Jul  | 
101.63 | 101.23 | 
| 
 Aug  | 
102.06 | 102.64 | 
| 
 Sep  | 
97.68 | 99.26 | 
| 
 Oct  | 
98.71 | 100.08 | 
| 
 Nov  | 
98.72 | 100.29 | 
| 
 Dec  | 
98.87 | 99.43 | 
Last modified date: January 24, 2022