Power BI Desktop web scraping incremental import / not delete old rows

Hi Power guys

I can't be the first one with this challenge 🙂

I have a problem with scraping data from a source, which of course updates, but than the old rows disappears.

(The source only have the last X days of data displayed).

Let's say I scrap a website / table like:

01-28-2020  123

01-29-2020  234

01-30-2020  345

01-31-2020  456

02-01-2020  567

02-02-2020  678

02-03-2020  789

02-04-2020  891

How do I refresh the data and still keep the old dates (rows) in Power BI Desktop / without "deleting" them:

01-28-2020  123

01-29-2020  234

01-30-2020  345

01-31-2020  456

02-01-2020  567

02-02-2020  678

02-03-2020  789

02-04-2020  891

02-05-2020  894

02-06-2020  895

02-07-2020  896

02-08-2020  897

Is there an easy way, like just hit a button "insert data as new rows" / "keep old rows"?

I have seen someone duplicate the data to a new table and merge, but it take forever if you what to do it offen.

The problem comes from:

https://socialblade.com which only display a certain number of dates (rows) back, and thereby hide the historic data.

(I'm a newbie)

Thank you so much, best regards 

Christian