Based on numbers here: https://seekingalpha.com/article/2789035-s-and-p-500-index-r...
1940-1950: 9.3%/y
1950-1960: 20.0%/y
1960-1970: 7.7%/y
1970-1980: 5.9%/y
1980-1990: 17.2%/y
1990-2000: 18.2%/y
2000-2010: -1.0%/y
So only decade with negative growth.
Add in the depression and you'll probably see a bunch more...
The S&P 500 returns are wildly variant, and the 9~ % only comes from averaging a century of growth. Whole decades might see a loss.