That data does not actually agree with any other data I can get from the CDC web pages. Where did you get the link from? Even the total death rate is nearly half of the actual total death rate reported for those years.

Here's the data I was quoting: https://www.cdc.gov/flu/about/burden/index.html

Here is 2017 from 2016 (which I believe is basically the 2016-2017 calendar year) national vital statistic report: https://www.cdc.gov/nchs/data/nvsr/nvsr68/nvsr68_09-508.pdf

If you scroll down to Table B you can see that ~2,800,000 people died, influenza and pneumonia account for 55,000 deaths. This is more than that 33,000 cases of reported influenza because not all pneumonia is caused by the flu.

The data in your link is very strange in that it implies a rate of 10% of all deaths is by pneumonia, rather than the ~2% in roughly everything else I can find on the topic. I wonder if we are losing some context here?

Here is another mortality report. Just search for pneumonia: https://www.cdc.gov/nchs/data/nvsr/nvsr68/nvsr68_09_tables-5...

Literally nothing I can find on the CDC's website matches up with the data on that report so I'm at a loss what's going on with it. It's too bad there is no text because I think we're missing something.