It does not appear that there is a clear and consistent decrease in the number of yearly injuries caused by tornadoes over the years.

• 1950s-1970s: The number of yearly injuries seems relatively high with some significant peaks, particularly around 1953, 1965, 1974, and 1979.
• 1980s-1990s: There appears to be some fluctuation in the number of yearly injuries. The highest in 1984, 1985, and 1987 with 20-22 injuries.
• 2000s-2010s: The number of yearly injuries varies, with notable peaks in 2011 and 2021, indicating that some tornadoes still cause high numbers of injuries.

Overall, while there may be periods with lower numbers of injuries, the presence of occasional significant peaks in the number of yearly injuries suggests that tornadoes continue to cause substantial damage and injuries in certain years. Therefore, it is difficult to conclude a definitive decreasing trend in the damage caused by tornadoes based solely on the number of yearly injuries.

Based on the data, there is no clear downward trend in yearly fatalities caused by tornados.

• 1950s and 1960s: there were quite a few years with high fatality counts, especially around 1953 and 1968.
• 1970s and 1980s: had some variability, with noticeable peaks in some years.
• 1990s and 2000s: it seem to show lower numbers overall, but 2011 and 2021 had significant spikes in fatalities.

So, while there are periods with fewer fatalities, the occasional high spikes suggest that tornadoes still cause serious damage in certain years. It's difficult to say there's a clear decrease in the damage caused by tornadoes in terms of yearly fatalities.