A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogram for the systolic blood pressure readings for those people aged between 25 and 40. Use the histogram to answer the question. The blood pressure readings were rounded up to the next whole number. 
Approximately what percentage of the people aged 25-40 had a systolic blood pressure reading greater than or equal to 130?
Definitions:
Deadweight Loss
The decrease in economic effectiveness happening when a good or service does not reach or cannot reach its equilibrium state.
Monopsony Power
The market power held by a single buyer in a market, allowing them to influence prices and terms of trade.
Elasticity Of Market
A measure of how the quantity demanded or supplied of a good changes in response to price or other economic factors.
Supply Elasticity
A measure of how much the quantity supplied of a good changes in response to a change in its price.
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