Not actually a question - it's a link to a recent blog post that describes a procedure for working it out.  Hope it's of interest:

https://jeffollerton.wordpress.com/2015/05/10/how-does-a-scientists-h-index-change-over-time/

https://jeffollerton.wordpress.com/2015/05/10/how-does-a-scientists-h-index-change-over-time/

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