year	gdp	gdpf	x
1972	1207	3107.1	1
1973	1349.6	3268.6	2
1974	1458.6	3428.1	3
1975	1585.9	3221.7	4
1976	1768.4	3380.8	5
1977	1974.1	3533.3	6
1978	2232.7	3703.5	7
1979	2488.6	3796.8	8
1980	2708	3776.3	9
1981	3030.6	3843.1	10
1982	3149.6	3760.6	11
1983	3405	3906.6	12
1984	3777.2	4148.5	13
1985	4038.7	4279.9	14
1986	4268.6	4404.5	15
1987	4539.9	4539.9	16
1988	4900.4	4718.6	17
1989	5250.8	4838	18
1990	5522.2	4877.5	19
1991	5677.5	4821	20