Prediction graph

[John Galvin]

Dear community! I have a task to produce a graph of three realistic scenarios for health spending (in proportion of GDP) from 1980 to 2050.
I have a dataset by ONS and data on health spending from 1980 to 2018.
However, I am struggling to make a scenario graph for the "future" time up to 2050.

Could you advise me on how to do this, please?

[Phil Bromiley]

You didn't get a quick answer. You'll increase your chances of a useful answer by following the FAQ on asking questions - provide Stata code in code delimiters, readable Stata output, and sample data using dataex.

I'm not sure what it means to have a task. We don't help with homework. The first and most important question is how you are planning to predict spending as a proportion of GDP. Once you have such a model, margins and marginsplot will probably do the graphs.