data.frame(
Group.1 = c(1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997),
av_corr_LatinAmerica = c("c(1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997)",
"c(NaN, NaN, NaN, NaN, NaN, 4.19333333333333, 3.53625, 3.63555555555556)"))
Here is the reprex for the column that is not working