Articles, R+D expenditure and percentage	Period	Total
Number of articles	1997	21,964
Number of articles	1996	20,006
Number of articles	1995	18,283
Number of articles	1994	16,214
Number of articles	1993	15,309
Number of articles	1992	13,824
Number of articles	1991	11,903
Number of articles	1990	10,688
Number of articles	1989	10,007
Number of articles	1988	9,342
Number of articles	1987	8,815
Number of articles	1986	8,033
Number of articles	1985	6,956
Number of articles	1984	6,218
Number of articles	1983	5,747
Number of articles	1982	4,967
Number of articles	1981	4,182
Number of articles	1980	3,908
Number of articles x 100/researchers FTE public sector(1)	1997	53
Number of articles x 100/researchers FTE public sector(1)	1996	50
Number of articles x 100/researchers FTE public sector(1)	1995	51
Number of articles x 100/researchers FTE public sector(1)	1994	45
Number of articles x 100/researchers FTE public sector(1)	1993	48
Number of articles x 100/researchers FTE public sector(1)	1992	46
Number of articles x 100/researchers FTE public sector(1)	1991	41
Number of articles x 100/researchers FTE public sector(1)	1990	40
Number of articles x 100/researchers FTE public sector(1)	1989	43
Number of articles x 100/researchers FTE public sector(1)	1988	41
Number of articles x 100/researchers FTE public sector(1)	1987	45
Number of articles x 100/researchers FTE public sector(1)	1986	44
Number of articles x 100/researchers FTE public sector(1)	1985	42
Number of articles x 100/researchers FTE public sector(1)	1984	38
Number of articles x 100/researchers FTE public sector(1)	1983	36
Number of articles x 100/researchers FTE public sector(1)	1982	32
Number of articles x 100/researchers FTE public sector(1)	1981	26
Number of articles x 100/researchers FTE public sector(1)	1980	25
Public expenditure x 100/number of articles (thousands of current pesetas)	1997	15,329
Public expenditure x 100/number of articles (thousands of current pesetas)	1996	16,198
Public expenditure x 100/number of articles (thousands of current pesetas)	1995	16,363
Public expenditure x 100/number of articles (thousands of current pesetas)	1994	17,672
Public expenditure x 100/number of articles (thousands of current pesetas)	1993	18,671
Public expenditure x 100/number of articles (thousands of current pesetas)	1992	19,107
Public expenditure x 100/number of articles (thousands of current pesetas)	1991	17,513
Public expenditure x 100/number of articles (thousands of current pesetas)	1990	16,585
Public expenditure x 100/number of articles (thousands of current pesetas)	1989	14,630
Public expenditure x 100/number of articles (thousands of current pesetas)	1988	13,065
Public expenditure x 100/number of articles (thousands of current pesetas)	1987	11,555
Public expenditure x 100/number of articles (thousands of current pesetas)	1986	10,705
Public expenditure x 100/number of articles (thousands of current pesetas)	1985	9,998
Public expenditure x 100/number of articles (thousands of current pesetas)	1984	9,776
Public expenditure x 100/number of articles (thousands of current pesetas)	1983	9,661
Public expenditure x 100/number of articles (thousands of current pesetas)	1982	9,893
Public expenditure x 100/number of articles (thousands of current pesetas)	1981	9,491
Public expenditure x 100/number of articles (thousands of current pesetas)	1980	8,434
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1997	8,705
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1996	9,390
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1995	9,769
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1994	11,073
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1993	12,164
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1992	12,989
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1991	12,718
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1990	12,907
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1989	12,212
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1988	11,686
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1987	10,922
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1986	10,705
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1985	11,109
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1984	11,694
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1983	12,899
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1982	14,766
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1981	16,141
Public expenditure x 100/number of articles (thousands curr. pts. 1986)	1980	16,157
Global production percentage	1997	2.4
Global production percentage	1996	2.2
Global production percentage	1995	2.1
Global production percentage	1994	2.0
Global production percentage	1993	2.0
Global production percentage	1992	1.9
Global production percentage	1991	1.7
Global production percentage	1990	1.6
Global production percentage	1989	1.5
Global production percentage	1988	1.3
Global production percentage	1987	1.2
Global production percentage	1986	1.1
Global production percentage	1985	1.0
Global production percentage	1984	0.9
Global production percentage	1983	0.9
Global production percentage	1982	0.8
Global production percentage	1981	0.7
Global production percentage	1980	0.7