I see what you mean, but there are a couple “design taboos” here that would never fly if you do data visualization. The red dots are connected, which is a problem when you don’t label all the countries (I can see bends to zero in between, which suggests missing labels of countries. If the line was unconnected and became dots, we would have a scatter plot which would help us identify the issues in the x axis. The red line is hiding the x-axis missing countries, which was my point, not that a line can’t go to zero but that it did go down to zero so many times. Now a more speculative issue: if it keeps going to near 0, as a data analyst you would want to know about these instances (even if they were 1, or just under 1), since they might point to inconsistent data collection and data quality processes by each country.