Year	Egg Masses ha-1

1980	13922.442

1981	3596.79

1982	254.64

1983	19.098

1984	25.464

1985	6.366

1986	0.107

1987	25.464

1988	31.83

1989	668.43

1990	2081.682

1991	1164.978

1992	0.182

1993	6.366

1994	38.196

1995	31.83

1996	6.366

1997	6.366

1998	0.899

1999	0.864

2000	19.098