I don't think they can be considered consistent over the years. 20% of our GDP is healthcare and that's only going to grow as the population ages. I don't know what percent of the GDP is financial services but that'll probably also grow until we get something akin to 2008 again.
Including healthcare and financial services in GDP figures feels out of place and unproductive but I'm not an economist so I don't know what I'm talking about.
Then you have the services sector which makes you reconsider what the point of calculating a country's GDP is to begin with?