It's now possible to collect data for your current number of followers on your LinkedIn page.
With the new Total Followers option you can get data by day on how many followers your LinkedIn page currently has.
This is a non-aggregatable metric, and it is not possible to fetch historical data. Data over the number of followers will be available from the day you connect the data source.
To read more about the LinkedIn Organic connector and the available reports dive into our knowledge base and the What data can I get from LinkedIn Organic? article.