Calculate the percentage increase or decrease in the given dataset.
The company had an increase of 5,000 employees in the last five years. This represents a 50% increase in the number of employees. 

This is calculated by finding the difference in employee numbers (15,000 - 10,000 = 5,000) and dividing by the initial number of employees (5,000 / 10,000 = 0.5), and converting the result into percentage (0.5 x 100 = 50%).
Five years ago, the company had 10,000 employees and now the company has 15,000 employees.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Calculate the percentage increase or decrease in the given dataset.

### Input:
Five years ago, the company had 10,000 employees and now the company has 15,000 employees.

### Response:
The company had an increase of 5,000 employees in the last five years. This represents a 50% increase in the number of employees. 

This is calculated by finding the difference in employee numbers (15,000 - 10,000 = 5,000) and dividing by the initial number of employees (5,000 / 10,000 = 0.5), and converting the result into percentage (0.5 x 100 = 50%).