Question: * * Question 4 . 5 . * * Finally, let's revisit the ` population _ by _ year ` DataFrame from earlier in the

**Question 4.5.** Finally, let's revisit the `population_by_year` DataFrame from earlier in the lab. Compute the year when the world population first went above 7 billion.
year_population_crossed_7_billion = population_by_year[population_by_year.get('Year')>7000000000].shape[0]
year_population_crossed_7_billion

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