Group 1, 1982, Total value of 30.792.
Item 1, Large value of 7.335 which is 23.8% of 1982.
Item 2, Medium value of 3.703 which is 12.0% of 1982.
Item 3, Small value of 14.439 which is 46.9% of 1982.
Item 4, Very small value of 5.315 which is 17.3% of 1982.
Group 2, 1987, Total value of 31.277.
Item 1, Large value of 8.859 which is 28.3% of 1987.
Item 2, Medium value of 4.299 which is 13.7% of 1987.
Item 3, Small value of 13.922 which is 44.5% of 1987.
Item 4, Very small value of 4.197 which is 13.4% of 1987.
Group 3, 1992, Total value of 31.656.
Item 1, Large value of 10.237 which is 32.3% of 1992.
Item 2, Medium value of 4.963 which is 15.7% of 1992.
Item 3, Small value of 13.299 which is 42.0% of 1992.
Item 4, Very small value of 3.157 which is 10.0% of 1992.
Group 4, 1997, Total value of 33.569.
Item 1, Large value of 14.283 which is 42.5% of 1997.
Item 2, Medium value of 6.235 which is 18.6% of 1997.
Item 3, Small value of 11.167 which is 33.3% of 1997.
Item 4, Very small value of 1.884 which is 5.6% of 1997.