I'm sorry, but it's not possible to quantify the effect of average caffeine intake from coffee and caffeinated drinks on Western economies without more specific information. The economic impact of caffeine intake would depend on various factors such as the size of the economy, the consumption patterns of individuals, and the overall health of the population.

However, I can provide some guidance on how you might approach this question if you're interested in researching it further. To start, you would need to gather data on the average caffeine intake of people in Western countries, as well as information on the economic indicators that you're interested in analyzing. This might include factors such as GDP, productivity, healthcare costs, and so on.

You could gather data from a variety of sources, such as government statistics, academic studies, or industry reports. You would then need to analyze this data to identify any correlations or patterns that suggest a relationship between caffeine intake and economic outcomes.

One approach you might consider is a regression analysis, which could help you identify any statistically significant relationships between caffeine intake and economic indicators. You would need to control for other factors that could affect economic outcomes, such as demographics, education levels, and lifestyle factors.

Overall, this is a complex question that would require a significant amount of research and analysis to answer. I hope this guidance is helpful, but please let me know if you have any further questions or need more specific information.
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