Table:
text: Economy of Kuwait
Macro-economic trend
Macro-economic trend
Year_ Gross_Domestic_Product US_Dollar_Exchange Inflation_Index_2000_is_100 Per_Capita_Income_as_of_USA
1980 7764 0.27 Kuwaiti Dinars 55 171.08
1985 6450 0.29 Kuwaiti Dinars 68 71.58
1990 5328 0.29 Kuwaiti Dinars 80 37.00
1995 8114 0.29 Kuwaiti Dinars 92 62.14
2000 11570 0.30 Kuwaiti Dinars 100 48.92
2005 21783 0.29 Kuwaiti Dinars 108 64.35

Question: Which year before 1980 had the highest inflation index (2000=100) for Kuwait's economy?