What does it mean when someone says “this is my very last straw”?

It is an expression that means something similar to 'you are on my last nerve' which means that you are driving me out of my mind

Explanation:

the last in a series of unpleasant events that finally makes you feel that you cannot continue to accept a bad situation: Losing my job was bad enough, but being evicted was the final straw. She's always been rude to me, but it was the last straw when she started insulting my mother.

Explanation:

the last in a series of bad things that happen to make someone very upset, angry, etc. It had been a difficult week, so when the car broke down, it was the last straw.

the andes or andean mountains (spanish: cordillera de los andes) are the longest continental mountain range in the world, forming a continuous highland along the western edge of south america. this range is about 7,000 km (4,300 mi) long, about 200 to 700 km (120 to 430 mi) wide (widest between 18° south and 20° south latitude), and of an average height of about 4,000 m (13,000 ft). the andes extend from north to south through seven south american countries: venezuela, colombia, ecuador, peru, bolivia, chile and argentina.

from wikipedia

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the answer is "by providing data about careers and annual mean wages"