Historical yearly trends in the usage statistics of site elements for websites

This report shows the historical trends in the usage of the top site elements since January 2014.

	2014 1 Jan	2015 1 Jan	2016 1 Jan	2017 1 Jan	2018 1 Jan	2019 1 Jan	2020 1 Jan	2021 1 Jan	2022 1 Jan	2023 1 Jan	2024 1 Jan	2025 1 Jan	2025 31 May
None	4.8%	5.1%	2.4%	0.8%	0.6%	0.6%	0.8%	1.6%	1.6%	1.1%	0.8%	0.6%	1.1%
CSS	90.0%	90.0%	93.7%	95.9%	95.6%	95.8%	95.5%	96.1%	96.1%	96.7%	97.0%	96.9%	95.6%
Compression	52.9%	59.1%	64.3%	70.3%	73.6%	77.2%	80.7%	83.0%	87.0%	87.8%	88.6%	89.8%	88.9%
Default protocol https					26.9%	45.9%	57.4%	68.8%	77.4%	81.2%	84.9%	87.7%	88.0%
Cookies	46.6%	46.0%	49.3%	50.6%	49.8%	46.6%	45.1%	44.9%	36.7%	40.8%	43.0%	41.8%	41.0%
Default subdomain www					42.2%	42.7%	40.8%	38.9%	38.1%	40.6%	40.3%	38.7%	38.9%
HTTP/3							2.3%	4.1%	24.2%	25.1%	27.8%	33.6%	34.9%
HTTP/2			5.6%	11.2%	23.1%	32.5%	42.6%	49.9%	46.9%	40.0%	35.5%	34.5%	33.1%
HTTP Strict Transport Security	0.1%	0.4%	1.0%	2.4%	5.3%	9.2%	12.1%	16.9%	22.8%	24.9%	27.3%	29.7%	30.7%
IPv6	2.9%	5.2%	6.1%	9.6%	11.4%	13.3%	15.0%	17.5%	20.6%	21.0%	22.6%	26.0%	26.6%
ETag	15.7%	15.1%	15.2%	14.5%	14.1%	14.4%	14.1%	14.4%	16.2%	17.3%	21.9%	24.1%	25.4%
QUIC					0.6%	1.4%	2.8%	5.1%	7.2%	8.5%	7.7%	8.5%	8.6%
Frameset	1.8%	0.9%	0.7%	0.7%	0.6%	0.6%	0.5%	0.3%	0.2%	0.2%	0.2%	0.2%	0.2%
SPDY	0.6%	3.2%	6.3%	7.5%	9.1%	0.6%	0.2%	0.1%	<0.1%	<0.1%	<0.1%	<0.1%	<0.1%

The diagram shows only site elements with more than 1% usage.

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