The economic prosperity of a nation is often reflected by the number of people in employment. The Australian Bureau of Statistics (ABS) collects data on the number of people in employment in various sectors. The table below gives the total number of people employed in June 2015 and June 2019 in various sectors. Test at the 1%level of significance whether the distribution of employment changed in these four years. Assume normality of the difference in value in any industry.

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June 2019 Employment by industry (000) June 2015 Agriculture, forestry and fishing 491 499 Mining 135 190 Manufacturing 974 896 Electricity, gas, water and waste services 108 116 Construction 983 1047 Wholesale trade 531 569 Retail trade 1260 1313 811 Accommodation and food services 928 Transport, postal and warehousing 559 564 Information media and telecommunications 173 168 Rental, hiring and real estate services 368 395 964 Professional, scientific and technical services 893 Administrative and support services 685 877 Public administration and safety 66 81 Education and training 295 363 1001 Health care and social assistance 846 199 Arts and recreation services 184 Other services 447 437