Year current LCU 1973 2649.9351537032494 1974 2654.0741762029506 1975 2289.250329692625 1976 2268.3621431882907 1977 2570.0934579439254 1978 2695.049000890925 1979 3295.365891714776 1980 3867.9073161831784 1981 4089.9615373322763 1982 4272.3442757372695 1983 4518.851231795291 1984 4668.832529867952 1985 4782.795048281774