It should probably be a scatter plot instead of a line chart, since interpolating values between points here is not meaningful. If there were 0 deaths in 1990 a

It should probably be a scatter plot instead of a line chart, since interpolating values between points here is not meaningful. If there were 0 deaths in 1990 and 100 in 1992, that doesn't necessarily mean there were 50 in 1990. Maybe a cumulative count would work better, normalized by total flyers per year.