Holdings
3.1956 - 37.1990; 43.1996,7/8,12; 44.1997,9; 47.2000,2,5,7-9,12; 48.2001,4,6; 49.2002,5; 50.2003,9; 53.2006,1; 55.2008,8; 56.2009,9; 57.2010,3,4,7-8,10; 58.2011,11; 59.2012,4; 69.2022,9
Holdings gaps
[N=10.1963,2,4,6,8,10;23.1976,8;37.1990,5]