Edit: grammar
The gender ratio isn't changing though. If anything it is becoming worse, it was decades ago that less women went into software engineering today.
The only thin that changed is that now every company tries to put their women software engineers front and center, in their marketing material, to go speak at conferences etc. So it looks like there are more women, but there aren't. Tech companies also tries to improve these statistics by bundling non programmers into this category, like product and project managers.
> 2008 Male: 72.33% Female: 27.67%
> 2013 Male: 73.44% Female: 26.56%
> 2018 Male: 73.82%. Female: 26.18%
The year by year numbers are too noisy to really mean much. 2018 being 0.3% percentage points higher than 2016 doesn't say much.
Anyway, the main point is that the gender ratio isn't really improving. At best you can say that it has stagnated, rather than getting worse as it did a decade ago.
Reference: https://jaxenter.com/wp-content/uploads/2017/04/women-in-com...