Articles, R+D expenditure and percentage	Period	Total
Number of articles	1998	23,461
Number of articles	1997	22,077
Number of articles	1996	20,080
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 x 100/researchers FTE public sector	1998	52
Number of articles x 100/researchers FTE public sector	1997	54
Number of articles x 100/researchers FTE public sector	1996	50
Number of articles x 100/researchers FTE public sector	1995	51
Number of articles x 100/researchers FTE public sector	1994	45
Number of articles x 100/researchers FTE public sector	1993	48
Number of articles x 100/researchers FTE public sector	1992	46
Number of articles x 100/researchers FTE public sector	1991	41
Number of articles x 100/researchers FTE public sector	1990	40
Number of articles x 100/researchers FTE public sector	1989	43
Number of articles x 100/researchers FTE public sector	1988	41
Number of articles x 100/researchers FTE public sector	1987	45
Number of articles x 100/researchers FTE public sector	1986	44
Number of articles x 100/researchers FTE public sector	1985	42
Number of articles x 100/researchers FTE public sector	1984	38
Number of articles x 100/researchers FTE public sector	1983	36
Number of articles x 100/researchers FTE public sector	1982	32
Number of articles x 100/researchers FTE public sector	1981	26
Public expen. x 100/number of articles (thousands ptas)	1998	15,645
Public expen. x 100/number of articles (thousands ptas)	1997	15,250
Public expen. x 100/number of articles (thousands ptas)	1996	16,138
Public expen. x 100/number of articles (thousands ptas)	1995	16,363
Public expen. x 100/number of articles (thousands ptas)	1994	17,672
Public expen. x 100/number of articles (thousands ptas)	1993	18,671
Public expen. x 100/number of articles (thousands ptas)	1992	19,107
Public expen. x 100/number of articles (thousands ptas)	1991	17,513
Public expen. x 100/number of articles (thousands ptas)	1990	16,585
Public expen. x 100/number of articles (thousands ptas)	1989	14,630
Public expen. x 100/number of articles (thousands ptas)	1988	13,065
Public expen. x 100/number of articles (thousands ptas)	1987	11,555
Public expen. x 100/number of articles (thousands ptas)	1986	10,705
Public expen. x 100/number of articles (thousands ptas)	1985	9,998
Public expen. x 100/number of articles (thousands ptas)	1984	9,776
Public expen. x 100/number of articles (thousands ptas)	1983	9,661
Public expen. x 100/number of articles (thousands ptas)	1982	9,893
Public expen. x 100/number of articles (thousands ptas)	1981	9,491
Global production percentage	1998	2.5
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