Convert long term daily data into 10 daily data

Hi all,
Could you please guide me for code that is about to convert daily data ( 1st showing date and 2nd showing data) into 10 daily data for long term series. The data set looks like

1/1/2017 24
2/1/2017 15
3/1/2017 19
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31/12/1950 13

and output should be like that

10/1/2017 mean of first 10 values of the data
21/1/2017
31/01/2017
10/01/2016
-------
------
10/12/1950
11/12/1950
31/12/1950



Kind regards,
Saleem