Stackoverflow has this great survey.
As a developer, I have questions about my career as well as my children.
These problems are general enough that I would expect other developers like me might be interested in as well.
Therefore, I did some statistical data exploration and find some quite interesting insights.

A companion Medium post with key findings is available at:
https://medium.com/@zhenyuzhu/a-peek-of-developers-career-from-stackoverflow-annual-survey-2019-5e49bb92df0b

This project runs on python 3, and used the following libraries:
numpy version: 1.14.2
pandas version: 0.25.0
matplotlib version: 2.1.0

This project includes:
data folder
jupyter notebook (the code)
output folder

The data folder is empty, due to size limit. But they data is available at:
https://drive.google.com/open?id=1QOmVDpd8hcVYqqUXDXf68UMDWQZP0wQV