2007–2011   2002–2006   1998–2002   1993–1997   1988–1992 Selected consolidated data 1988–1992 (in CHF) 1992 1991 1990 1989 1988 Number of employees   1,829 1,745 1,672 1,642 1,527 Sales core business CHFm 253.1 200.2 168.9 151.0 128.0 Total sales CHFm 342.1 294.0 256.6 238.9 200.5 EBITDA CHFm 48.2 41.2 36.6 5) 5) EBIT 1) CHFm 31.2 27.1 24.5 5) 5) Net income2) CHFm 18.6 14.5 11.4 8.7 5.9 Cash flow 3) CHFm 35.6 28.6 23.5 20.7 14.8 Shareholders' equity 2) CHFm 146.2 112.3 97.7 77.5 60.2 Net liquidity / (debt) CHFm (17.4) (49.4) (59.2) (71.3) (75.3) Total assets CHFm 290.9 250.5 249.4 223.2 202.4 Investments 4) CHFm 18.7 15.6 24.1 15.0 24.3 1) earnings before interest and taxes 2) including minority interest 3) earnings before depreciation/amortisation, including minority interest 4) in property, plant and equipment 5) as the interest expense was included in the administrative expenses, the EBIT and EBITDA values can not be calculated retroactively