Late usage of Lunar Years on cancellations

An area of interest to collectors collecting early Republic postal history and cancellations is the late use of Lunar Cancellations with "Gan Zhi" Lunar year on the cancellation. Where year is still relatively common, others are harder to find. Below is the table of the Chinese characters used for the Lunar year and some references.
LUNAR YEAR   WESTERN DATE   REFERENCES  
  1913.2.6 - 1914.1.25   The Postal History Research Magazine VOL. 7 Article by M-F Tsai page 63 diagram 41 (on cover)  
  1914.1.26 - 1915.2.13   The Postal History Research Magazine VOL. 6 Article by P. S. Yen page 57 diagram 59 (on cover)  
  1915.2.14 - 1916.2.2.      
  1916.2.3 - 1917.1.22   HISTORY OF POSTAL CANCELLATION VOL. 4 by P. K-S CHANG page 285 (on stamp)  
  1917.1.23 - 1918.2.10      

I have an example of the year on cover, but I would like to know if any collector have a cover with Lunar year latter than that. The latest on the list is year. So many people have doubt about it existence that many experts listed Lunar years till year. Below I would like to show three of my cancellations.

Sure, year do exist. If any collector have any of the last four years listed on the above table, stamps or covers, please drop me a line. Thank you.

 

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