https://deadline.com/2019/01/rotten-tomatoes-scores-rising-movies-getting-better-1202532224/
movie marketing consultant David A. Gross recently calculated Rotten Tomatoes scores since 1997 for films released on 1,000 or more screens. The results were fairly steady for the first 14 years, with the average critical score for movies rising or falling annually between a low of 40.8 in 2004 and a high of 47.1 in 1999. The number of wide releases earning a positive score of 60 or better was more ragged, ranging from a low of 33 in 2001 to 60 in 2007.
But then something happened. The average score began climbing, from 46.6 in 2010, to 57.2 last year. At the same time, the number of films scoring above 60 began to rise, from 41 in 2010, to 74 in 2018.