'How to find median in Numpy 2d array with matching column

From my basic math I know the median salary is 40000 of all jobs listed but how would I obtain that using NumPy?

eg Find the salary of the median of all jobs listed

1st column = salary

2nd column = no. of jobs advertised

 ``` x = np.array([
           [10000, 329],
           [20000, 329],
           [30000, 323],
           [40000, 310],
           [50000, 284],
           [60000, 232],
           [70000, 189],
           [80000, 130],
           [90000, 87],
           [100000, 71]]
           )

numpy

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'How to find median in Numpy 2d array with matching column

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