CSS 2025 queries

[asdaraujo]

Queries for the CSS 2025 chapter (#4070)

Notes:

• The metrics descriptions that mention "per year", will be reported for all the years from 2019 to 2025, unless explicitly mentioned otherwise
• Percentile metrics will be reported for the 10, 25, 50, 75, and 90th percentiles, unless explicitly mentioned otherwise

CSS composition

Stylesheets

• average number of stylesheets per page, per year
• percentiles of the number of stylesheets per page, per year
• largest amount of stylesheets loaded, per year
• average CSS size per page, per year
• percentiles of CSS file size, per year

Lines of code

• percentiles of lines of code per stylesheet, per year
• percentiles of lines of code per page, per year
• percentiles for atrules, rules, selectors and declarations per page, per year

Embedded content

• percentiles of embedded content size, per year

Comments

• percentiles of comments per page, per year