Bestand
1999,1-8u.10-12u.14-37u.40; 2000,1-7u.9-18u.22-24u.26-28u.32-33u.35u.37-40u.43u.46-52; 2001,2u.6-12u.33; 2002,8u.11-12u.15u.19-37u.39-43u.45-51; 2003,3-6u.14u.17-20u.23-27u.43-52; 2004,1u.3u.5u.7u.10-20u.22u.24-25u.27-32u.36u.38u.41-42u.45-50; 2005,1-5u.10u.12-17u.19-20u.26u.33u.38u.40-46u.49u.51-52; 2006,1-2u.8u.11u.15-19u.23-24u.26u.28u.32u.35u.39-51; 2007,2u.5u.7-10u.13u.15-29u.31-52; 2008,1-32u.34-50; 2009,3-8u.10-26u.28-44u.46-47u.49-52; 2010,2-26u.28-51; 2011,1-5u.7-52; 2012,1-28u.30-38u.40-52; 2013,1-3u.5-36u.38-52; 2014,1-17u.19-27u.29-50; 2015,1-4u.6-23u.26-37u.39u.41-42u.44-48u.50; 2016,1u.3-4u.6-29u.31-37u.39-52; 2017,38u.40u.49; 2018,16u.26u.30u.32-34u.36u.41; 2019,3u.5u.9u.11-12u.14-15u.17-21u.24-26u.31-32u.43; 2020,9u.15-16u.18u.24u.28-30; 2022,24; 2023,14; 2024,2u.8
