Has there been a change in the average EF Rating?

Decade	Ef0	Ef1	Ef2	Ef3	Ef4	Ef5
1950s	1057	1858	1428	404	138	20
1960s	1826	2563	1902	507	124	16
1970s	2450	3688	1883	525	140	25
1980s	3303	3341	1241	331	91	5
1990s	7387	3308	1093	382	96	10
2000s	8199	3455	970	291	53	2
2010s	6326	4166	1101	300	76	10
2020s	1042	866	205	42	12	0

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After analyzing the data in comparison by decade, there was a decrease in average EF rating from 1960s – 2000s. There has been a slight increase in the 2010s and 2020s, but still a decrease from 1950.

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